WORST SERVICE PROVIDERS

my contract with you guy i for 149 a month, every month i my data has run out, i get a notification. now i get the bill of 650? from what and how? i am not going to pay for something i didnt sign up for. yall can go to hell. why dont you people ever keep your word and notify people if their bill has exceeded the agreed amount? this is *** and im going to pay the agreed amount. yall can even close that damn contract. you are *******!