Business ProfileforSandia Sunrooms

We decided to get 3 windows and a sliding door from Sandia Sunrooms. Once we discovered that they had issues, we tried to get them to correct them via warranty. Supposedly they have lifetime warranties, but they claim that the company that made them no longer exists, so they can't honor the warranty. The issues I have, are that they leak allowing air in and during windy season, the sliding door emits a howling sound. I don't see the point of saying that we will get better insulated energy efficient windows to help us with our energy costs, and then they don't work properly. I called and went to the office repeatedly to get them to here my complaint and get them repaired or replaced. I really don't care which, I just want my windows and sliding door to work properly. I got one of the main installation mangers to come by and check for himself after showing him videos and pictures at their place of business. He told me he would get back to me, and I never heard from him again. I since have gone back 2 more times and keep getting the run around. I even saw them at the home show, and asked for their help again in honoring their warranty and again was never called back. Please help me with this issue. I feel I paid a lot of money for no reason, my goal was to seal my house up to lower my energy bills and of course not have air blowing in as well as dust/dirt. I would like them either repaired or replaced. Thank You!