REPEATEDLY DEDUCTING FUNDS WITHOUT CONTRACT!!!

Vodacom is deducting huge amounts of funds from a bank account via debit order whilst no contract was EVER entered into. Once this was brought under Vodacom's attention, they simply advise that an affidavit must be lodged and refused to even attempt in checking their systems for any form of contractual agreement! This is ridiculous as hundreds (now thousands) of Rands are ********ly deducted, repeatedly! - surely this is against the NCA & CPA??!! And further, whilst a person (in an attempt to honour other [and actual] monthly payments) attend your bank to reverse the ******* debit orders, face a situation where Vodacom will now probably list a NON-CUSTOMER as a bad- and slow payer at the credit bureau! REDICULOUS!!!!!