Trevi Pools & Spa Calgary

I had an inground pool installed by trevi in Oct. 2010 we first used it in summer 2011. We notice a small rock that was between the conrete floor and liner. So I called the installer to come and repair it he said he would not come up from Calgary unless a paid him $ 1,500.00. Not to happy by the response I called the owner of Trevi head office in Quebec and he said that he would take care of it. Now three weeks is gone by with not a word. I'm a second time customer bought a above-ground pool in 1993 installed it myseft.
I very dissappointed in the way they treated me when I even help them load up the trucks when they were excavating the hole. I guess there's no warranty with them.