iPhone 8 Plus - Wifi Problems

Good evening Folks,

I recently purchased the above and I'm loving it, however this past week I have been having wifi problems.

For the first couple of weeks the wifi was working perfectly, now i'm lucky to get 0.5mbps and the wifi keeps coming and going.

Now before anyone asks, ive spoken to support and they have logged my problems and went over some possible problems and gave me some solutions to try and fix the problem, however none of these have worked.

Im just wondering if anyone has experienced the same problem as me and if they got it resol