Bad Service & Account Issues

Vaal Networking has been our service provider for 6/8 months now. Three months ago we cancelled our subscription as we moved and our new body corporate will not give us permission to go ahead with instillation of their antenna. Since we have moved and cancelled our subscription Vaal solutions kept debiting our account with the R800 fee. The fee you pay when using their services, but in this case were not able to as it wasn't even installed (which they also charged us for so they were well aware) we have been phoning them constantly and it has come to a point where they tell me to phone the next day and when I do another lady tells me to phone in three days time to speak to the lady who promised they will not debit our account anymore. I am so sick and tired and this point they are passing the buck around avoiding to returning the three months of subscription fee they owe us.