my mtn sim not getting network in uae

I have been roaming my MTN sim since I entered UK two years ago, all of a sudden I lost the network. Why and how do I get it back, please?

There is no network on my MTN, i can't receive OTP Has my sim been blocked?

SIM Not Registered! My sim says not Registered. I have tried all cheat options, turned off and on the phone, removed and reinserted properly, reset the network on the phone but...