Business ProfileforAmerica's Advantage Remodeling

This company have replaced the sidings and windows and since then it has leaked. contacted the company multiple times more than 10 time! After several attempts, they sent someone to take a look. I was told by this person that the flashing or something was missing about 4". I called the company back and left multiple messages and never did anyone return to fix. It's been over several years since incident and the condition is getting worse. Just called on 3/22/22 at 2:10pm and spoke to **** who told me that it is no longer covered under the warranty and the company have been taken over. Ironically it's been taken over by the same person that came to give us a quote 12 years ago, ******. So becuase they have ignored my request for several years then now transferedd their company name they are ****** me they are no longer responsible. Then I quoted something in the contract stating the lifetime warranty. **** said she will speak to her boss and get back to me. Never heard back, I called again 4/ 2/22 and 4/6/22 4:18pm and both times my phone went directly to VM. Feels like they have routed my number to VM to ignore my concerns. I want to know what are my next steps to ensure they take care of their responsibilities and as there will be more rain coming the damage will worsen. Thank you for your help.