Poor Connection

My wife and I play Xbox, we have been have extremely poor connection issues lately. For the amount that we pay we shouldn't have any issues. Within the past two months we have been lagging and I cant even finish a game of madden without losing connection to the wifi. I am hard wired in and every 15 mins our party disconnects. Is anyone else having this problem? I have reset the modem both physically and within the app. States we are running 115% of what we should. Makes zero sense.