DISGUSTING NON EXISTANT SERVICE

I have had an ongoing problem going for the whole of July.<br> <br> This is a billing issue where they cannot tell me where the extra ammount on my account comes from.<br> I have called SEVERAL times and promised I will be called back with answers.<br> THIS NEVER HAPPENS- EVER.<br> <br> I have just tried to call customer services again, I asked to speak to the supervisors, but I just hear them complaining about me in the background and then disconnected the call.<br> <br> This is DISGUSTING UNACCEPTABLE INCOMPETANT AND CARELESS SERVICE.