CONSULTANT IS COSTING ME DEBIT CHARGES!

I called Cell C (30 /03/15)requesting their banking details so that i may deposit my account in arrears and spoke to Sindiswe Mbokazi who asked me the reason for changing to deposit, and i responded that I changed account numbers. She insisted that I give her my new account number because a deposit wont be necessary, she will run a debit order the following day. It didnt go through the new account but instead went off on the old account number, another consultant called me a couple of days later and i brought to her attention what happened with Sindiswa, she could see the note and too also said she will run a debit order AGAIN ON NEW ACCOUNT. It wasnt done, and now another debit order went off yesterday on the same OLD ACCOUNT! WHY ARE YOU NOT USING THE NEW ACCOUNT AS INITIALLY REQUESTED FROM YOUR SIDE???? EACH RETURN DEBIT ORDER CHARGE IS R150 PER TRANSACTION, IMAGINE HOW MUCH THAT ACCOUNT IS OVERDRAWN! This morning i call in to raise my concerns and told that i need to make a deposit, WHO IS GOING TO BE RESPONSIBLE FOR THOSE BANK CHARGES?