Disgruntled customer

Took out a contract with yellow data in 2016 for R99. Everything was going well but then in November of 2016 l upgraded nd my new contract came with 50 gigs of data 10 000 minutes 400 sms nd 300 anytime minutes. I was shocked in December of 2016 to see dat my account for a R99 contract was nw R494. I phoned yellow data nd enquired about it but got no response. So being frustrated l then cancelled the contract in February of 2017. Since it was almost mid month l knew l had to pay for February dat was okay but as of March my account was still being debited for R99. The consultants at yellow data are the worst bunch of individuals 1 can ever put up with. I called them numerous times in regards to cancelation nd was told yes it is cancelled but could not tell me as to why my account was still being debited. Cancelled in February 2017 then again in July 2017. But it didn't stop der in continued. Called again was reassured dat this won't happen but it still continued. Frustrated l asked to speak to a manager but the consultant said dat der was no manager or supervisor available nd dat dey will inform dem to get back to me. Still waiting. Growing more frustrated because the months are going nd the year is coming to an end l call again only to be told dat yes we have checked your account has been cancelled nd dat u will be refunded on the 22 December 2017. Bull**** 23 December l get debited again. Called again in 2018 get told don't worry u will get your money soon l decided to use vulgar terms out of frustration. I ask again to speak to a manager but yet again no manager available. Hw do you run a business with no heads . It's April I'm still waiting for a reply. Nw l want MTN to understand something l have been a loyal customer for almost 15years. I have never been so disappointed with service up until u gave idiots like yellow data a franchise of yours to run it to the ground with so many *********** consultants dat know jack **** with hw to go about helping loyal customers dat is why many off your loyal clients will be leaving if this is not addressed with immediate effect. I know l will be 1off dem. I will be awaiting your response better still dis is my number call me like hw u guys call us for taking contracts. ********** 170