Iowa Lumber & Construction build a patio and 4 Sea...

Iowa Lumber & Construction build a patio and 4 Season room on that patio for us. At the time of a sale and making a decision with which company we should use, Iowa lumber & Construction have assured us to go with them because they are local company and that they will provide the best warranty. We recently discovered spots on our door glass "gass leaked out", exterior walls vinyl is braking and rotted plywood on outside of the walls. I called them to explain issues and concerns, but their response was that they don't have any records of that job done. I scanned all of the paperwork, receipts, plan and warranty card with their stamp on it and emailed it to them. After a few days passed and no return call from Iowa Lumber & Construction I called them to follow up on my email sent and at that time they said that they can't help me because company that was manufacturing 4 season patio rooms went out of business this year, and they suggested to me to hire a handy man for wall repairs and to replace 20 year warranty glass doors at my own expense.
Company that don't honor their warranty, and don't keep records of their sales and installation jobs is not reputable and don't deserve anyone's business.