Rental company charged me for clogged toilet repair -> replacement

So a my building charged me for a clogged toilet repair that turned into a total replacement.

Its listed as a plumbing damage charge, I don't believe they have a basis to charge for that. What should I do?

Also my insurance company interestingly didnt renew my tenant insurance policy ive had fot years with no change.

Should I ask them to provide the documented charge and consider filing a claim with my insurance seeing as they're dropping me anyway? Should I ensure I have a new policy before I file that claim

Not proud but proudly not ashamed