How to claim the refund from an immigration agency after failing to fulfill obligation?

I approached an immigration consultancy in Dubai for a Canada work permit, we signed an agreement and I paid AED 28,600. The agreement said if the company doesn't process my work permit within 6 - 8 months, I will be entitled to a full refund within 90 working days.

The company defaulted on the processing time and I requested and signed a refund document with the company stating that a "refund will be given within 90 working days".

From the look of things, the company isn't willing to refund the money after 90 working days.

In this case, what should I do or where should I complain to get my money back from the company ASAP?

Note: my visa will expire on February 24, 2023, and the 90 working days for the company to refund me will end on February 04, 2023.

Thanks for your assistance.