check if vodacom debits you according to contract

I took out a data bundle contract that included a router free for R169 per month. After going through my invoices I realized that Vodacom was debiting me every month for the router. I called Fred at Vodacom Brooklyn a month ago and he promised that he and Louis would look into it. I have subsequently called numerous times every time Fred says that he will sort it out and phone me back. he never did. eventually I called this morning and told him I wanted sorted out today. he called me back and said it was sorted out, but in order for me to get a refund I must provide my bank statement to prove to Vodacom that they debited my account incorrectly. Vodacom is inconveniencing me and wasting my time.