Incorrect subscription charge on a Sale by Hazel Mckenzie

I have been disputing this **once off payment** from a Sales agent Hazel mckenzie who put the sale through incorrectly and now im being billed for a mistake she made telkom has not resolved this or called me to correct this mistake and i have been calling in every day since the 19th of November when i put in the dispute. i will not have those funds in my account untill telkom sales department or who ever fixes this mistake that was made by a agent.