Advice on dealing with a gaslighting landlord after vacuuming 30 times

My husband and I are moving into a new rental this week. We did the walkthrough (at night) and everything looked relatively clean and the place is pretty new.

We got our keys a week early so I went over to do a quick vacuum and mop (which I normally do upon every move in) and the carpets were covered with black fur that stuck to the carpet. There was also pee and poop on all 4 toilets. The place just wasn’t cleaned.

In our master bedroom the floor smelt like wet dog so I kept vacuuming and bought a shampooer to get the smell out. Couldn’t get the smell or the fur out. After 30 vacuums and a shampoo, the fur STILL will not come out. The previous tenant literally never vacuumed. After vacuum 6 I asked our landlord for $300 off rent to cover cleaning supplies (which he said yes to) but then asked if he could professionally clean and he said no because “there will always be things to clean and I did a thorough vacuum.”

ADVICE I NEED: after looking at these pictures of all the bags of fur we’ve vacuumed (also knowing the fur just keeps coming), what would you ask the landlord for in addition to $300 off rent and how would you deal with them?