USELESS SERVICE AND STAFF

Home connect why am i being shaped every night. I am have now been moved from a 15/15 to a 20/2(not what i signed up for and not happy with this at all). During the day i get full speeds and like clock work every day at 5 it drops to a 2/1 line speed. You guys are in breach of contract. I will cancel my service with you and I WILL NOT PAY BACK THE INSTALL FEE!!!!