Vodacom

I'm very sad customer,I have been calling Vodacom for more than six months , just to receive my refund,what happened is I had contract with Vodacom that came to end of July 2019,I did everything that I'm supposed to do ,for contract to be terminated,so the problem is I had a scheduld payment with my bank to pay Vodacom my contract every month R500,it was not a debit order,so after contract terminated it did not cancell automatically like debit order,I forgot to cancel the scheduld payment with my bank ,so on 15 July 2019,my bank continued to pay Vodacom And already my contract was terminated,so that means that amount is sitting as Credit on account ,even serval consultant confirmed it,I'm not happy at all, because for my query to be solved I have to deal with rude consultant ,who just transfer to different departments that just tell my query has been logged,i sent proof of payment serval times, Vodacom all I need From is my money R500,I don't need a second contract,or laptop or cellphone,or data sim card,I need my money please.....