Does the company have the right to deny the person...

Dear Customer,
Welcome again!

As a response to your previous inquiry, the company is not entitled to deprive the worker of the thirty-day period, and we advise you to look for work during that period if you want to continue working for another employer in the UAE. Also, if the company insists on depriving you of staying for thirty days after the date of canceling the visa, a complaint can be submitted to the Ministry of Human Resources and Emiratisation, in addition to another complaint to the General Directorate of Residence.

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Kind Regards, 

Dear Customer,
Welcome again!

You can contact the Ministry of Human Resources in order to submit a complaint through its website:
https://www.mohre.gov.ae/en/our-services/بحث-الشكوى-العمالية.aspx 
As for the general administration of residence, it is necessary to review it personally in order to complain.

Accept our respect and appreciation.
Kind Regards,