Assistance for cancellation MTN Insurance

On the 1st of November 2019 I have done a upgrade sim only at MTN Riverside Mall Vanderbijlpark. Lebo was assisting me with the upgrade. I did asked her to cancel the insurance on the phone that was on the previous contract. Lebo did log into my account and asked if the payment is so high due to the insurance? I confirm "yes" and again asked please cancel the insurance. Lebo gave me a form to sign Mobile Device Insurance Waver, and Lebo confirmed that the insurance was cancelled. I asked Lebo when will I be paying the new premium, and she confirmed November 2019. I received my accountant for November 2019, and notice I am still paying the higher premium. When I received my bill to be payed December I notice Lebo did not cancelled the issuance. I contacted MTN Costumer care and they did provide me with MTN Insurance Contact details. I cancelled the insurance on the 25th of November 2019. On the 26th of November 2019 a message was left at Puleng for Lebo to contact me. To date I did not receive any feedback from Lebo. On the 27th of Nov. an email was send to the Manger ,Rene Potgieter, for assistance. According to Lebo she did informed me that I must canceled the insurance and she gave me MTN Insurance number. I informed Rene Potgieter that Lebo knows it's not the truth. I am really upset that Lebo is not willing to take responsibility for her actions, she does not even have the guts to contact me to settle the problem. Rene did contact the area manager, but according to Rene they only have my word and the consultants word. I need urgent help whit this matter and also to confirm what the amount was that have to be payed November. As I feel that Lebo does not understand the MTN System as she is suppose to. Please contact me on the following number: *** Account no; A***