Vodacom Service at Greenstone is terrible!

We got my children 2 x Vodacom Tablets from Vodacom Greenstone on contract with 500MB of Data to be loaded every month. July only 166MB of data was loaded. August nothing has been loaded and it is now the 6th of August! Debit order has gone through so the accounts are paid yet nobody at the store can tell me why no data has been loaded as yet despite me going into the store on the weekend just be told that Vodacom is having a problem and I should wait till Monday. I called the store on Tuesday just to be told that they will look into it and give me a call back. Today is Thursday and nobody has bothered to return my call. I called the store again this morning at 9am and was promised that they will look into it and call me back. 1pm no phone call, so I called the store again, was told give them 15min and they will call back. 3pm no phone call. I called them back and was told that the consultant dealing with this - Valencia is currently helping a customer... Nobody can tell me what the issue is, why data has not been loaded... I am beyond irritated right now and to think that I was considering porting from MTN to Vodacom. Plus they debit the account, but no invoice is emailed!