Vodacom,you suck !! and have also lost a customer.
Checking my bank VC has charged me for their bugger up !!
I must say I am truly surprised that your bank account has been affected, as these "December" usage records havent actually been billed yet. Vodacom (VSP) bill tomorrow (sunday) and only then is there a chance your bank will be affected.
If you are not with VSP, then it is not Vodacom who affected your bank account.