My previous company can not give coc

If your inquiry is related to obtaining a no-objection letter, here is the following information:
You cannot terminate the employment contract before the end of its term without the consent of the employer, and if you terminate the employment contract without the consent of the employer, a ban will be imposed against you and prevent you from obtaining a work permit for a period of one year.
We recommend negotiating with the employer in order to terminate the employment contract and cancel the visa.
If the employer refuses to issue a letter of no objection without a legal reason, you can file a complaint with the Ministry of Human Resources and Emiratisation.
Here is the text of the new UAE labor law, related to your inquiry:
(Article 50)
If the foreign worker stops working, for an illegal reason, before the end of the contract period, he will not be granted another work permit.
To join another job in the country in accordance with the provisions of this Decree-Law, for a period of one year from the date of cessation of employment
Work, and no other employer who is aware of this may use him or keep him in his service during that period.
The Ministry may exclude some job categories, skill levels, or employment from the provision of Clause (1) of this
Article, in accordance with the controls and procedures specified by the Executive Regulations of this Decree-Law.
The employer must notify the Ministry of the fact of interruption from work in accordance with the procedures specified by the regulations.
implementation of this Decree-Law.