TELKOM MOBILE ROB YOU BLIND

I cannot say how disappointed I am with Telkom mobile's service. I have 3 contracts with Telkom mobile. On 15 June 2015 I went to the Telkom Mobile shop in Westgate and requested that 2 of the 3 contracts be cancelled as they were due for upgrades. Since then, I have been debited for the 2 contracts every month. In total, Telkom has billed me 3 months in a row for 2 contracts that I cancelled. I have only budgeted for the R399.00 top-up contract, and yet my bills are reaching over R900 each month. What's even more disturbing is that last night (03/09/2015) I received an SMS saying that I have reached my monthly spending limit??? I have literally only made 1 phone call from my phone since the 01/09/2015. The phone call lasted less than a minute. I also only sent 2 SMS's since the 01/09/2015. In other words, 1 phone call and 2 SMS's made me reach my monthly limit on a R399.00 contract? I also received an SMS saying that I have less than 99MB data left. My contract stipulates that I get 1GB data every month. I have not used 900MB in 3 days!!! I have just about had it with Telkom Mobile and the pathetic service you guys give. I want this billing issue sorted out ASAP!!!