Rent is due to be transferred today. In the past 7 weeks my toilet has broken and flooded 4 times, leaving me with the cleaning up (couple of hours each time) and massive inconvenience. Landlord has come and rodded drain first 3 times which fixed problem temporarily and finally on 4th time he sent an actual plumber who fixed it (again temporarily) and said it would definitely happen again and that I need a drain survey. This was 2 weeks ago and though he's said he would, landlord hasn't had someone come to survey the drains. He said they'd come Mon/Tues this week but still no sign. When toilet breaks it floods kitchen and hallway and is obviously extremely unhygienic. It also means taps/shower can't be used as it makes toilet flood more. Every time I shower I wonder whether I'll be going down to more flooding. AIBU to say I'm not paying rent until drain survey is done?