"Everything else" question.

The hot water heater in my condo has been broken for about 3 weeks now. I have done everything my agent has asked for (taken pics etc), and he seems to be doing the right things, but the owner/his secretary seem to be dragging their feet (I've seen the Line messages between my agent and the owner's secretary).

Do I have any recourse in this situation? I've been very patient and not expressed how ridiculous I think this delay is, not been rude in the slightest, but something's got to give at some point. I don't want to pay my next rent because of this, but I know that that would just cause me even more issues. I'd also like to just hire someone myself and deduct the cost of that from my next rent payment.

Any suggestions? Being calm and patient has gotten me nowhere. Getting angry and confrontational won't get me anywhere either. I don't know what to do and I don't want to cause problems for when it's time to get my 2-month deposit back.