Am joel my company delays salary trying talking to...

We would like to inform you that regarding to wages, the law has provided them with legal protection, which must be paid to the worker in accordance with the legal text:
Article 65
The Worker shall be entitled to the wages specified in the service contract and if the contract does not specify the wage the worker shall be entitled to the wage specified in the work regulations.
If the wage is not specified in accordance with the preceding paragraph the worker shall be entitled to a wage equivalent to the wage specified for work of a similar type in the establishment and otherwise in accordance with the custom applicable to the profession in the place of performance of the work and if there is no such custom the judge shall specify the wage in accordance with the requirements of justice.
Article (66):
The wages and other sums to which the worker is entitled shall be paid in the Qatari currency. The wages of the workers employed on an annual or monthly wages shall be paid at least once in every month. The wages of all other workers shall be paid once at least every two weeks. The wages shall be paid to the worker himself within the working day’ and during working hours in the usual place of work or any other place to be approved by the Department and may be transferred to the account of the worker with the bank to be agreed upon by the two parties or paid to the attorney appointed by the worker in writing.
The employer shall not be relieved from his obligation to pay the wage due to the worker unless he has actually transferred it to the bank or the worker or his attorney has signed in acknowledgement of the receipt thereof in the register or receipt prepared for this purpose provided that the said documents shall include the details of the wage.
So, you can file a complaint in the labor office to get your dues.
According to the Residence Law:
Article 21:
The employer, the Competent Authorities, and the Ministry of Labor and Social Affairs may agree to transfer the Foreign National laborer to another employer before the time limit in the contract has been reached or after five years of working for the employer if the contract did not specify a time period.
The Foreign National laborer may, with authorization from the Competent Authorities and the Ministry of Labor and Social Affairs, transfer to another employer in the event of the Recruiter’s death or dissolution of the body corporate for any reason.
Article (22)
The Minister or his representative may authorize the temporary transfer of a Foreign National laborer to another employer in the event of a legal suit existing between the Foreign National and his Recruiter, on the condition that the Ministry of Labor and Social Affairs agrees, as regards the laborer who is subject to the referenced Labor Law.
The Minister or his representative may authorize the transfer of a Foreign National laborer who is not subject to the referenced Labor Law to another employer if proven that the Recruiter was abusive, or if required by the general welfare.
For the same reasons, with the consent of the Minister or his deputy, upon the application of the applicant for employment and the approval of the Ministry of Labor and Social Affairs, the arrival shall be transferred to another employer.
Article (66):
The wages and other sums to which the worker is entitled shall be paid in the Qatari currency. The wages of the workers employed on an annual or monthly wages shall be paid at least once in every month. The wages of all other workers shall be paid once at least every two weeks. The wages shall be paid to the worker himself within the working day’ and during working hours in the usual place of work or any other place to be approved by the Department and may be transferred to the account of the worker with the bank to be agreed upon by the two parties or paid to the attorney appointed by the worker in writing.
The employer shall not be relieved from his obligation to pay the wage due to the worker unless he has actually transferred it to the bank or the worker or his attorney has signed in acknowledgement of the receipt thereof in the register or receipt prepared for this purpose provided that the said documents shall include the details of the wage.
So you don't need NOC and you maybe get the permission to change the employer by the Ministry of Labor and Social Affairs