Cpc Contracting (Gta)

I was given a really good price by this company and while they were working it would seem the workmanship is acceptable (although these guys didnt use a level nor did they speak a word of english). Only after we paid Chris and they left, the tiles starting having lippage. This is where the edges of the tiles pop up relative to the centre of the tile. We asked around and seems they used the wrong material in the installation. We called Chris to come back but he refuses to do the repair. We now have to call another contractor to come and fix the problem.