Bad service from Telkom telephone sales staff & management

In January 2020 a sales consultant contacted me with an offer for an additional simcard worth 1 gig. for the amount of R40 per simcard. I decided to choose 2 one for myself and one for a family member. The sales consultant asked me which date I should be debited and I advised that I want both to go off on my regular contracts debit date as well as the new amount to be added to my regular statement to enable me to confirm the amount t payable. February I paid my account as per normal assuming that as per request there should be one amount including the additional Sim card fees to be added to one billing. The sales consultant as per my enquiry on Sunday the 15th on March 2020 have not indicated as per my request that the debit order shouldbe deducted by Telkom on the last day of the month which concluded that a debit order run were made into my bank account for over R500. The Telkom customer service consultant advised me that the retention department will contact me and I advised the day's I will be available after contacting Telkom as I wanted to know procedure for cancelation due to bad service from Telkom sales staff as well as me mentioning to all staff that I have spoke to that the Sales staff whom contacted me were more concerned about if there were places to rent in my area, I think that caught me totally off guard and I assume diverted her attention from the task at hand which was making sure that I was given correct information and loading the correct debit date which was loaded incorrect by the sales consultant and communication via statement and sms were then incorrectly communicated to me. I spoke to Telkom retention department this morning and were told by staff member Babalwa that I can cancel but need to pay cancelations fee. I feel that me needing to the shortfall in months not debited as well as failure for debit order to go through I am willing to pay the outstanding amount thowever feel due to Telkom lack of staff efficiency I should not pay the cancelation fee of R800 due to lack of service and inefficiency of staff I have desruption of finances which have been caused by Telekom staff. I have had over the span of +-10 years had a good relationship with Telkom as an organization and this experience have just damage the trust I have in Telkom telephonic sales. I asked Babalwa at Telkoms retention service to speak to her manager, I were then told that her manager is in a meeting. Which I find that management should be there for the client. I'm not surprised that Telkoms sales are dropping and this maybe due to bad customer services and I wonder what Telkoms in esters would think when they find out the reason for drop of sales.