EFT paid in to wrong account

I rented a car from avid Rand Airport in Gemiston from the 27th September until the 27th October 2017. I paid a R1350 cash deposit and was told to supply my personal bank account details for the deposit to be paid in to the account. I returned the car on the requested date & time of the 27th October. I called on the 3rd November 2017 to find out when EFT will be paid in to my account. I was told the instruction was made on Wednesday the 1st and would be paid in to my account on Saturday or latest by Monday. I asked what amount they R1082 will be paid as they have deducted -toll fees. I requested them to send me the invoice as I cant pull it from the Avis website. The consultant emailed it to me on friday.

I patiently waited on Saturday for the money to come in. I then called my Mom and she told me it was paid in to her account. My biggest problem is I requested AVIS to pay the money in to my Bank Account and not hers. Where in Gods Name did Avis find her bank account details. She does not want to give me the money back we are not the best of terms. This is Avis fault and they should rectify the mistake and write off the money that was paid incorrectly in account.