Agreement not honored

Good morning I had a contract with C track and the contract was terminated because C track delayed to remove the tracker in my old car to my new car. I’ve been communicating with Elsie and I agreed on paying 1300 in 3 months via EFT I made the first payment and sent her the proof of payment. She assured me that the debit orders are stopped she has communicated with the accounts department. A debit order of 163 was taken in my account on the 25th and this morning a debit order of 882 was debited and my account didn’t have sufficient funds which cost me 100 of debit order rejection . If I didn’t pay the agreed amount I would understand why they went into my account but now I honored the agreement whoever C track is not . I pay them and pay unnecessary debit order rejection charges. I want the bank charges fees and stop abusing me please.