M.S.
I have been a licensed Realtor since 2005 and thankfully have never had this problem come up before. I would hope that both sides can work this out in a very amicable manner. Litigation can be expensive. Real estate agents are not allowed to give legal advice or act as a lawyer in anyway. I'm sure your Realtor is diligently working on a solution to the problem but if it cannot be worked out between both sides, you may have to consider consulting with an attorney. I agree with the other post that said to get a second opinion on the leak problem.