Wifi signal keeps dropping

A few days of excellent wifi signal and data connectivity after my previous complaint, and now, we're back to shocking/non-existent connection. We connect for a few minutes, then drop. Reset, try again. This goes on most of the day. As I explained to the chap who called, this has been a problem for YEARS. I gave an alternative number to call if I was not available. No one called my husband, just sent an Sms saying you tried calling my number without any luck and the issue is resolved... What *******... Resolved for a few days!