Bad customer service

Bad customer service shem. I was debited twice by telkom first payment was on the 30th of November 2021 last payment 17th of December 2021. I requested a refund for the last debit since the 17th of Dec till today I do not get a straight answer from the consultants what is worse is that most of the consultants I spoke too do not seem to know their work, which is utterly annoying and pathetic!