Bad service and they dont do their job properly

i informed them to change my details few days before 25th and its was in June, they told me if D/O doesnt go off i must go in and pay cash and from July they will use it from new account but they never did it. i got first sms from them to tell me what i am owing them which i have no idea what the amount is for, when i asked them they said its not on their system. and they stll havent use my new account to do D/O. Why must i pay for bank charge if they didnt update it since the day i change my detailed? i am not going to pay for something i dont know nothing about.<br> <br> they are really bad service and i am not happy when they **** to me to say they did update the details but its seems they never did their job properly.<br> <br> how can they can giving me call all the time that i am deaf and cant hear on the phone? why cant they just send sms or email???<br> <br>