No assistance after debiting my account

I made an order for a HP Notebook on the 17th of March 2020, the consultant called me and confirmed the order on the 18th of March and my account was debited on the 20th of March 2020.

However, on the 23rd of April 2020, I was told that the order was cancelled due to there being no stock. (Even though the same product is now listed on the website at a much higher price!)

I have contacted Telkom multiple times now to reverse the debit order they took since there is no stock and they are not replying to me. The call centre is of no help!