Two Phone Contracts Taken Out On My Name

Rather go prepaid than having a cellphone account at VODACOM. I have had a 500MB data contract with Vodacom for almost 2 years, with a monthly subscription of R119. In August I was debited with way more, afterwhich I logged into My Vodacom, to see 2 new numbers on my name. I phoned 082 111 and was told that the 2 contracts were opened in VODACOM shops, one in August and 1 a week later beginning of September. I was told that they can 'see how it happened' and it will be closed within 24 to 48 hours. It is 3 weeks later, the accounts and my debit order is growing! As it is linked to my '1 and only original contract', I can not cancel the debit order??? How can I close these accounts and get refunded from Vodacom for the debit orders already deducted? I thought proof of ID, residence, work address, bank statements etc are needed to open accounts....Inside job I guess....