Urgently need a Goodstanding letter from Telkom

Hi, Telkom recently accidentally cancelled my lines, after a dispute and making sure that my account was up to date, telkom debited my bank account twice over the caurse of 3 day. The amounts was disputed and returned to me, but bow the disputes reflect on my statements. I tried to contact customer care but havent recieved anything yet. I just need a letter from telkom to confirm that the depits where made by mistake and that the accou ts is up to date. My account was re instated and everything is in order. All i need is the letter for credit reasons. How do I get in touch with someone who can assist?