Man, that sucks you got hit with a chargeback on a banner you clearly delivered. I feel for you, because these customers know the system favors them and they try it anyway. You did the right thing paying for help since the bank usually wants a clean packet with tracking and the signature all lined up. Trying to fight one of these alone means digging up proof at the last minute and hoping the bank reads it, and most people I know who went that route lost. Getting it paid for itself in one dispute tells you all you need to know. Sorry you had to deal with a lying customer in the first place.

The bit about "smell complaints that never even happened" is the real problem here, since a landlord can always make up a reason to say no. Next time, ask for a 3 month trial with one small bin and put it in writing that you'll handle turning it and keeping it clean. Once he sees it's not a big deal and the trash bill doesn't go up, he might come around.