Virgin Active - Adjusting debit orders without due cause to the detriment of their clients.

I have a membership with these people and have been paying my account diligently every month for R539. This month for no apparent reason my bill is R890. At first I thought this is due to non payment from my side but my banking records tell me that I have made proper payments since I engaged the contract with them. These people suck and they have no regard for contract terms and conditions. Think very carefully before binding yourself into a contract with them.