SB6190 - Dropping connection

My SB6190 stopped working 7-18-23, after only 7 months.  I called ARRIS support, they said the modem was in warranty. We troubleshooted the modem for about 30-40 minutes. I didn't have a hard wire to connect my computer to so the ARRIS rep said he would call back at 7pm on Wednesday. In the meantime I troubleshooted the modem again with Spectrum. Spectrum could tell that there was noise that was coming into the Modem causing it to drop, however outbound transmission was clear. I did hardwire on Wednesday while waiting for the ARRIS rep. Same outcome, it would connect, then drop. When I didn’t hear from the rep, I went to Spectrum to get a modem as it was critical I had connection as I work from home. Today (7-22-2023) I called Arris again. The rep wanted to walkthrough the entire troubleshooting process AGAIN. I said I was not disconnecting my hardware because I already wasted 2 hrs between them and Spectrum. I asked for a refund and she stated their policy is that they don't provide refunds. I cant get a refund from Best Buy because it is outside the return period.  This is absolutely dissatisfying and a consumer ripoff. I will never again buy this brand.