Incompetent Customer Service

Recently we just had a few people working on the networks lines near our home, afterwards our WiFi got remarkably worse compared to how it was before anyone worked on the lines. We’ve been having intermittent network connectivity since then and I’ve done literally everything I can do try and fix the problem without moving to a different ISP. But unfortunately I’m left with no choice, we’ve gotten a new router twice, talked to agents on the phone and in person, had 2 technicians come over to our house to asses and fix the problems we’re having, the common denominator is that nothing gets fixed or customer service tells me they “can’t do anything”. Are you kidding me? So I have to live with [Edited: "Inappropriate Language"] WiFi because the company that PROVIDES me with my WiFi cannot fix a problem THEY created. Unbelievable, genuinely. I’ve been with Xfinity for 12 years, I am a diamond member and none of that matters. I don’t want to be put above anyone else but the fact that I can’t get any help despite my loyalty to this company makes me worry for people who haven’t been with Xfinity as long as me. The customer service with the company is genuinely some of the worst I’ve ever interacted with, and they also aren’t even in the United States as xfinity outsources all of their customer service agents from other countries, absolutely embarrassing for a company that nearly had a monopoly in the US.