MTN South Africa Stole my Money and a very poor service to say the least

MTN South Africa, stole my money this month. I had a contract with MTN for the past 2 years and the contract end date was 19th April 2021. I went to MTN outlet in Heidelberg mall on the 19th with an intention to cancel my contract with them, however I was told by the lady who assisted me that, my contract could not be cancelled on the day and I needed to comeback the following day. Due to the bad customer service I received from the lady and the bad attitude she had, I opted not to visit MTN Heidelberg anymore. On the same day I then called MTN help line seeking assistance with cancelation, however this did not yield anything as I was put on hold for more than 45 minutes and then after the call just hung_up. On 20th April 2021 at around 08:00am I received 2 SMSs from MTN stating that my contract with MTN had ended and my contract will be changing from R309. 005 to R94. 78, this was sent for both phones I had on contract with MTN. Because I did not also want to keep having a contract with MTN I went to another MTN outlet at springs mall to further cancel this arrangement with MTN as I did not consent or even get a call confirming this. After getting assistance from a consultant in Springs mall, the consultant gave me a reference number for the cancelation {Ref No: ***} the consultant further stated that MTN will call me, however I should call should they not call me{which is disappointing from mtn} I called them 3 days later and still no one answered the phone from cancelations. It cam as a surprise to me when I saw my debit order from MTN stating an amount of R618 on the 26yj April 2021. Now this cannot be right on any level as they took money I did not have into my account and also took money without any authorization from myself. How can a company soo big ***** money from the poor whilst we are fighting a pendemic. This is a reap off and I believe MTN did this purposely. They mad delay tactics to ***** my money. I want MTN to pay me back money before Friday 30th 2021. I need this money to pay my other bills. This is unacceptable from MTN and you going to loose customers because 9f your ********** actions.