MTN Festival Mall Poor Service

I went into MTN Festival Mall to get assistance with getting an additional data contract. Also, to make sure that the debit order comes off the new banking details for both contracts. An agent at the store (Dedan Naidoo) told me he’ll be able to assist with both. Before leaving, I confirmed with him more than once whether the data contracts will come off my new banking accounts. On 26 August 2019, both contracts came off the old banking details. I went into the store 4 September 2019. Dedan is telling me that the accounts department and the accounts department is telling me that Dedan must solve the issue. I refuse to pay bank charges for something that was not my fault. On top of that, Dedan is having a ****py attitude about the whole situation telling me that he had told me that he is going to try. My understanding is that MTN stores are supposed to assist with the changes in banking details. Also, he did not notify me that this should take a month to come into effect - which I found out from the agent. This is not the first time I’ve received such bad service from MTN and Dedan’s attitude towards the situation made it worse.