Claiming compensation from the landlord for failing to fulfill obligations

I moved to an apartment in July 2018 and the landlord was outside of Dubai. Being a foreigner, he promised to complete all documentation soon and he cashed out my cheques.

Then he stated that the apartment was registered on his son (a minor) and doesn't have the necessary documents and he will complete when he comes to Dubai.

He came 9 months after I moved in and that costed me to pay AED 12,100 proven fine for late renewal of my maid’s visa (Ejari is the landlord's responsibility).

As per the contract, the Building Management deactivated access cards including the parking during my stay, saying the landlord failed to pay the service fee.

This was the case for 100 days. All failures were acknowledged by the landlord via emails. When moving out (July 2019) his agent inspected the apartment.

They promised to provide a list of deductions in few days which happened with 53 days delay and failed to present invoices and return deposit balance so far (80 days delay). The deduction is a round figure (suspicious).

Please let me know if you can assist and tell me about the cost.