String of problems after Autopge migration

Firstly no invoice or statement. I had to request mine. Then 3 calls and 4 or 5 days to load half a gig data once off. By 5 May the debit order hadn't run so I called. Was told I'm not the only one and it said ERROR on the system. Nobody after hours on the phone, 2 visits to Vodashops and many emails could tell me anything. I was told to pay cash. At the bank found the reference number on the invoice (I never did receive a statement) was missing an 8- after I had to call again. Got shouted at by an old lady in the queue at the bank. Paid eventually. Sent proof to Vodacom. This morning a debit order ran in my account. For R6100!!!!!! What the hell is going on at Vodacom???? No idea why so much as there is no gap in payments. My last dt order ran in April as usual for Autopage. There is nowhere left for me to get this sorted. Worst worst worst company by far. I'd rather send smoke signals or letters by snail mail.