Unwillingness to resolve a query

Two months ago i bought and connected an explora at my house in addition to the one i was already paying for my sister at a different location. Almost a couple of time a week i've had my services disconnected and every time i call in i'm told of an unexplained overcharging issue. Every time i called i'm told the issue will be escalated to the billing department for a resolution and these efforts have been in vain. This has been going on for long now and there seem to be no appetite from Multichoice side to want to resolve this concern. Very poor service indeed to say the least. It demonstrates ********* behaviour in that the company (multichoice) is happy to takes someone's money to provide a service which it has thus far failed to provide satisfactorily.