Telkom Mobile Sucks-Worst Customer Service

On 30 November 2015 Telkom sms'd me to say +- R880 will be debited for my monthly contract. I put R1000 into that account for the debit. To my surprise they debited +- R1200. When i had queries it they said it was an error on their side. They advised me of the amount i should pay, so I did. I than found out that the amouny was incorrect. Telkom had been debiting me since November 30th till date on the 15th and last day of each month causing my account to go into a negative of +- R1200 due to failed debit charges as i cancelled my contract after november. They advised me to send in bank statements so they could refund the failed debit charges as they admitted it was their fault. Up until today i have heard nothing and im left with a +-R1200 owing to the bank. Telkom is pathetic and their customer service is disgraceful. A bunch of idiots if i may say!