I had a similar problem with my liner separating at a seam. Instead of going back to the pool store where I purchased it, I went to the manufacturer. After all, my documentation said the warranty was with the manufacturer. I had a local pool leak locator come out and repair the leak. I sent the manufacturer pictures of the damaged area that was repaired, copy of the repair receipt, and a letter explaining the situation. They shipped me a new liner although I have to pay to have it installed or do it myself.