MTN SA ****MING WITH CONTRACT, BAD BAD SERVICE

I have a contract with MTN for an Iphone 14 in November 3 I paid manually and they received the money but next day they took their debit order and I was charged again meaning I've now paid ,twice , in December 14 they again took their debit , only to find that they charged me twice for November so they took only 35 cents ,this meant I wae covered for December but noooo they again came month and Took the money again meaning I've paid twice again for December, I am an organized person I work with budgets and now they just messed it up I WANT MY MONEY BACK they just took. My email is ***