Got hired to fix roof leaks. I fixed all of them but water was still getting in. I found it was a pipe without a seal to a drain . Well they decided to build a roof over this other roof. I told them it’s just a seal in the plumbing that needs fixed. Now they are building roof and don’t want to pay. I wasn’t hired to find plumbing leak . Spent five days fixing roof and I did. They didn’t know the plumbing had a leak . I found it . They think I must have not fixed the roof when I did stop every leak from roof. I didn’t know the plumbing had a leak nor did they. Can I file a lean