Wi-FI "Intelligence" is failing

Hi, your Wi-Fi Intelligence is failing. You keep selecting a channel for my 5GHz that is causing my speeds to drop from 500MB to less than 20MB. When you have changed the channel for me to 48, it works perfect! But every few hours to a day, it automatically goes back to channel 157 and I'm back to terrible speeds. The only fix cannot be to use a router, because if I need another product to make your internet work properly, you should be covering it then. Give people the option to choose their channel back! You are causing nothing but problems.