Issue getting my pro wifi extender activated

I received my modem and pro wifi extender on 6/7/25. I was able to get my modem set up through the app but every time I tried to get the pro extender connected I received an error message. I followed the trouble shooting via the app with no success including restarting my modem multiple times. I finally called the 24/7 number in 6/10/25 and spent about an hour on the phone with them troubleshooting the problem extender. The solution I was given that the extender was the problem and to take it into the closest store to be replaced. So I went to the store and was told they no longer keep the pro extenders in the store and that when I was in the phone they should have placed an order for a new one and emailed me a shipping label for the one I have. So I went back home and called again however the person I talked didn’t seem to understand my issue at first. Then they emailed me an article they said I could use to print a return label. However in the return section it doesn’t list my pro extender as an option to return just the modem. I was able to find a link to submit a form to request a new pro extender which I submitted in 6/10/25. After it was submitted it said I would hear back in 1-2 days. It’s been 3 days with no response and I’m getting more frustrated about not being able to get my pro extender set up when I’m paying for this service. Has anyone had this issue before or know the best way to get in contact with someone that can actually help? This has been so frustrating that I’m ready to switch wifi providers already.