DEBIT ORDER RAN 3 TIMES ON THE SAME DAY

I didn't pay my account last December so I was expecting Vodacom to debit me twice plus the penalties, to my surprise the debited me 3 times the same amount, I tried calling them but they keep on transferring me to different departments who cant even help me, finally they told me to speak to accounts. I called the accounts department, told me to enter the cell number in question: guess what? ''you have entered an invalid number'' now I don't know what to do cause it seems I cant be helped.