Inability to get the keys of a co-owned apartment. What to do?

I co-own an apartment in Hanover Square, Dubai but I am unable to obtain the keys for my apartment from the management company as they claim the 2nd owner is supposed to be present for key collection.

Unfortunately, the second owner is in Pakistan and with the travel restrictions, he is not able to present himself. I tried getting online POA notarized but failed as I couldn't get a reply.

I fail to understand! I am also one of the owners and we are not selling the property, we just want to have the keys so that we can utilize the apartment. We were promised that the keys would be given to us once we clear Dubai Land dept. dues but still are not able to take the keys.

We have tried reaching the real estate agent, management company&developers, no replies from any one of those. Only the real estate claims that both owners should be present to get the key, otherwise, I need to keep waiting. Else, I need to bring a notarized POA.

Any solution to this bizarre query? I am tired of moving back and forth from my resident city of Al-Ain.