Debits twice and still debit the next month then stop service

I have a router with contract *** vodacom, Vodacom November Month debeted R425 instead of R209, and then i contacted Gene from VODACOM in Rustenburg mall he said he will check and get back to me and never did. Then I assumed the other money will be for December, but then December the 209 was debited again, then I reversed the money because it is too much money then the services were stopped, then I called Vodacom and stayed on the line for a very long time no one picke the call and then i opted for the option for vodacom to call me back and they still not got back to me. It's now January no change no service!