maybe you overreact? listen, this kind of stuff is happening in qatar all the time. i mean they don't know what they are doing. they can give you key of someone's else flat very easy. the watchman is too lazy to be there, he prefer to sleep.nobody wants to fix an A/C in any place. you can wait for the maintenance for few days even in Beverly Hills tower. so why wouldn't you either go to the office where you signed the contract or try to contact the owner?

try to calm down ( i would be mad by now though!)and good luck