DEBITTED 3TIMES FROM TELKOM WITHOUT

I got a contract with Telkom (which is free me for R500 IPHONE 7PLUS)since September which they delivered IN THE WRONG COLOUR I CALLED AND ASKED THEM TO CHANGE THE COLOUR WHICH THEY DID COLLECT AND CHANGED THE COLOUR. on October they debited R1500 which the contract I signed said R500, when I called they said I have two contracts with them. I TOLD THEM THAT NO I ONLY HAVE ONE PHONE. THE MONTH OF NOVEMBER THEY DEBITTED R1000. I CALLED AGAIN AND ASKED WHY? THEY THEN OPENED ANOTHER CASE. THE 1ST CASE WAS NEVER CLOSED REGARDING MY DEBIT ORDER OF R1500. I NOW HAVE TWO CASE NUMBERS OF THE SAME ISSUE. THEY NEVER HELP THEY KEEP TELLING ME ABOUT THEM SENDING EMAILS TO THE BACK OFFICE AND THEY WILL CONTACT ME WITHIN 48HRS BUT I NEVER GET CONTACTED OR REFUNDED. THE CASE NUMBERS ARE ********** 0 AND ********** 5.