MWEB Stole My Money!

I am on a Telkom LTE deal for R699 pm. On the 14th of July, I ordered an MTN LTE deal for R630 pm to replace the Telkom one. SIM was delivered at the end of July and was not active. I waited for it to be activated and for the Telkom one to deactivate as I had requested. This did not happen for the duration of August. To my surprise, my statement stated that I had been allocated pro-rata data on the MTN SIM from the 11th of August which was going to set me back R400. This alone was confusing as the Telkom SIM would have needed to deactivate upon the the activation of MTN. Moreover, I was billed the R699 for Telkom and the R630 for MTN this month. I quickly responded to the mail and requested that someone call me to rectify this. The call never came. I became so desperate that I even logged a query on their website on the 29th of August. To this day, it has not been attended to. I woke up this morning to a staggering debit order R1750! I spent the day in vain trying to contact MWeb. I would like to have my deal cancelled and my money refunded in full to my bank account ASAP! If there's a better ISP out there, please do get in touch!