MTN debit more money than agreed

On 20 March 2021 MTN granted me a 24 months MTN mega gigs contact costing R299. The contract entails data and a Huawei P Smart 2021 device. I also have another account taken around November 2019 using a different cell number where i pay R230.

My total debit from the 2 MTN accounts is R529 (R299 +R230). However, the following monies were debited from my bank account since i opened the second account: 15 May 2021: R811.14 15 June 2021: R4 175.94 15 July 2021: R2 258.13 16 August 2021: R4 175.86 (reversed on the same day because i did not have money to buy food for my children).

I visited MTN Tzaneen Lifestyle Mall store for assistance around July for refund but was told that the only thing MTN can assist with is to reset usage to 0. No clear indication was given on why is MTN debiting more money than agreed on the contract is given. Several calls were made to MTN 083135 with no help hence i send this email.

I have since removed the simcard from the phone.

The response attained from MTN customer care says that the mistake was done by the salesperson who assisted me, Malefetsane Petrus Sello and i would like to request a refund from MTN.

I am of the respectful view that MTN owes me a refund totaling R4 600.21. This amount is the total debited from May to August minus R2 645 (R529 X 5) and the amount reversed in August.