Telkom, I want my refund!

I put through a cancellation of my account on the 28 June 2018. Upon which I received statements for payment end of July. I emailed your call center and spoke with Cindy Goliath who could not assist and just stopped replying after I gave her the cancellation ref and my ID. I contacted your online center, upon which I spoke to Samikuliswe and also confirmed that the last payment should been on the 30 July 2018 and the account should have been cancelled on that date. I phoned again to confirm cancellation on the 15 August 2018, another lady assisted and said you guys have a ****ty system, which causes people's accounts to be deducted twice. I rep**** that this shortfall should not be on the customer, but on Telkom! Again end of August came and another deduction came off. I tried phoning your call center, but no one can assist me. Which I find absolute bull****. I do not have an account anymore with Telkom and this is reflected on your online portal as well, yet you keep taking my money and show no transparency in this regard. To add on, I have gone through all methods of contact and no one could assist me fully. I was also kind enough to give the deduction 10 days to be refunded, but to no avail. I am not at all pleased with your service.