Worse WiFi issues after tech came out

Hello,

I had an Xfinity Tech come out recently and ever since they had come out I have been noticing a second WiFi connection under the same name as my own, one of them does not allow me to connect at all and the second one attempts to connect, but fails due to weak signal. When the tech was here it seemed they had set up the WiFi again as I was receiving notifications through the app that my WiFi name was changed to the same exact name I had set it up to before. When I check in the app I notice several different WiFi band options under the same WiFi name which I don't recall seeing before. I don't know what exactly he did, but I am beyond frustrated as my WiFi seems to be having more issues than it did prior to the appointment, I can't even connect some of my devices now which were connecting just fine prior. I should not be expected to pay for WiFi that is not working for me and for something that is no fault of my own I really need this to be working properly and I am just so tired of techs coming out and seemingly making things worse.

Any and all help will be greatly appreciated, thank you!