My working visa is going to be expired on May 22 ,...

We would like to inform you that if your inquiry is related to the company refusal to convert the visa to a residence permit, the following information is important:
If the employment contract expires, then you may transfer the sponsorship to another employer without the need for the consent of the previous employer.
The Ministry of Labor shall agree to transfer the sponsorship.
That is mean you shall get a new job or leave the country.
Here is the text of the Qatari Residence Law related to your inquiry:
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.
In all cases, the employer serving as the Recruiter shall not have his legal rights, or the contract between him and Foreign National, violated, in accordance with the referenced Labor Law.
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.

You can check with the police station to file a complaint.
An additional complaint can also be filed with the Ministry of Labor.