I just had my inground pool replaced. I paid the guy 800.00. That was a month ago. Yesterday I found a hard pointy rock protruding up under the liner. After further inspection, I found 4 smaller rocks also coming up. I called him and he said he could maybe hammer them out, or if not he would extract them. Does he mean he's going to cut open my new liner. What should I do? Please help!!! Thanks