Deposit reversal frustrations

I returned the car on Friday, 1st of July 2022. They said my deposit will be back after 7 working days. I phoned on Tuesday the 12th, they said it will reflect after 12 midnight and it didn't.. I called again on the 14th and was transferred to their finance department where I was assisted by Shaylene Hill and she advised me that the request has been sent and the funds will reflect after 24 hours. Today is Monday 18 July 2022 and I still don't have the deposit back in my account. I have been given a letter to give to my bank for the refund to be processed and that's another 7 working days of waiting in addition to the two weeks that I have already waited. They basically telling me in directly that getting my deposit back is no longer any of their business and I should take the issue up with my bank because their processes are failing. :(