Time limitation for claiming the end of service benefits

I had been working for an LLC company in Dubai for 6+ years on an unlimited contract and got terminated due to company restructuring.

I had signed my labour cancellation papers as they promised me that they will settle the amount at the earliest and currently working for a different company.

My termination happened in Nov 2016 and I had received half the amount of my end of service benefits in instalments.

I have not received the rest and they are not replying to my emails and they are telling me they will return for sure once the company is in good shape.

Please let me know if I still have a chance to get my end of service benefits.