American Leak Detection

They couldn't find the actual location(s) of the leak and said I had to re-grout the whole flagstone area. Even after I did that, the pool is still leaking. They said to give me 2-month warranty on their job, but when I called them about it, they either said they needed to check with the manager and would get back to me, or told me the manager was busy and he would call me later. But they never did. Bottom line, I paid more than 300 bucks and the pool is still losing water and they are not even answering my call.