Slow Xfinity Mobile Data Speeds

Every single month at the end of the month and the beginning I have to call overseas customer service because Xfinity slows my speeds for no real reason. I do not go over my data cap (especially when my speeds are slowed 2 days after a new billing cycle) and every time I call I have to wait an hour just for them to say, "oops sorry that should not have happened it wont happen again please re-start your phone and you should be back to normal speeds." I should not have to do this multiple times a month, I JUST DID THIS AN HOUR AGO AND MY SPEEDS ARE STILL LESS THAN 1MBPS. I am seriously about to get my lawyer involved because I am being sabotaged at this point.