Unauthorized debits

I've canceled my services in May after the debit for June was already deducted. I've asked for the R169 subscription and the consultant confirmed that due to June being paid already, the next instalment will only be deducted end of July. At the end of July I was charged the old subscription fee as well as a pro rata for the new subscription. I've sent emails, rep**** to the texts but no one bothered calling me back. Today a debit went off my account for R730! Why?! Why is no one handling this professionally. Technically, the amount I owe is R338 (2 x R169 for July and Aug), and with this I am deducting the R45 for each time I had to reverse your debits because no one got back to me. Alternatively, you can remove your tracker and I want NOTHING to do with tracker any longer!