Telkom Mobile/8ta Data contract still billing

I cancelled my Telkom Mobile/8ta Data contract at your Canal Walk Branch, and was told i would get a cancellation sms which never arrived, i was still assured that March would be my final payment, yet AGAIN the contract is not cancelled and i have been charged again this month. I want this contract to be cancelled with immediate effect, and my R199 x 2 Subscription i was billed to be refunded to my bank account.<br> <br> Please can somebody phone me ASAP regarding this.