OMG you have made some really serious and big errors!! First not getting the key??? Approving repairs without seeing the damage or problem??????
Second, I would NEVER NEVER NEVER buy ANY PROPERTY with sitting tenants!!!!! And you found out why I would never.
I once looked at a 4-plex and the seller told me not to evict one of the tenants. "She mows the lawn." It was a postage stamp. And, he brought the mower over from his house. Guess what, she was his piece on the side. He probably paid her rent. Maybe thats why he was selling, get an excuse to break up.
Another seller told me one of the tenants is his property manager lived there 10 years. So I should work with her on any repairs etc. Yeah fat chance! I'm not interested in having a co-manager, thank you very much.
How about 3 cats and 2 dogs? "All of them very well trained." Trained for what, to wreck my property?
So I restrict my activity to VACANT properties ONLY. I was a tenant once, too, and i remember how much I hated the landlord. every tenant hates their landlord with a burning fire, but when you meet with them they are so sweet and cooperative. They know how to work you!!! AND DRAIN YOUR BANK ACCOUNT!!!
Maybe you should sell this nightmare and find something else to do. If your awful tenant sees the FOR SALE sign, maybe that will cause a vacancy. I wish you luck in the next 8-12 months.