Triple debited

My account was in arrears by 1 month. I called Vodacom yesterday to ask whether I should wait for the debit order to come off or whether I should do an eft. I was advised to do the eft as only the normal installment will be debited. I paid arrears and this morning 3 x R1110 comes of my bank account. I call Vodacom and they advise it will be reversed. An hour later my line is locked. I call again and I am put thru to collections. I tell the consultant what happens and she says I was not supposed to pay and that they can and will not refund my money. Please can someone from vodacom contact me. I would like my money back!