Came in to have tubes replaced. Rear brake wouldn't work when he was done. Rode the bike home, left it in garage over the weekend. Got on it to go to work, rear wheel was flat. Called the shop and told them I paid for the puncture resistant tubes and after one ride it was flat. Asked if they sometimes might come factory faulty and if I could bring it in for a replacement. He said yes they uncommonly have faulty tubes and I could bring it in for a replacement. Few days later rode the bus to the shop with bike and receipt, and they said they won't replace it and they give no guarantee on tubes. He accused me of lying about my previous phone calls.