If you cannot get the pool liner to fit, you should first search & read: "
I have installed the pool liner and it does not look the way I would like it to, what do I do?" Ninety nine times out of a hundred, the swimming pool liner needs to be readjusted, or reinstalled. It almost always points to imperfection on the installer's end. It is much easier to readjust, or to fix and reinstall, or restretch, than to warranty a pool liner and wait for it to come. If it truly cannot fit, then you may be able to receive a pool liner warranty. Please read "
How do I get a Liner Warranty?" for all conditions and procedures of warrantying a pool liner.