Inefficiency in updating the payments and dealing queries in a satisfactory manner to the customer

Please can you kindly assist me in resolving this issue, Telkom has debited an amount of R1 394.06 on the 22 January 2019, on my account which was the amount owed to them, however when I went to their outlet and contact them they said the money is still outstanding which mean my payment doesn’t reflect on their system and no one is willing to assist in resolving the issue I even went to their shopping outlet at Key West were they have logged a call on my behalf and no one had come back to me to date. This is really affecting my credit record.

In addition to the above ever since the Telesales person sold me this devise years ago i have not in a single month received statements of this account.