Struggle for a refund

In July, I paid iff my car, sent proof of payment, nothing was done untili called to ask for papers, which was done in August after calling them several times. Accountwas finally closed, but I erroneously paid money via EFT to the closed account on the 3rd September, I immediately went to the branch to request reversal, I was told to wait for 3 days until it reflected,which I did, a week later I called Asset and vehicle finance to ask what had been dine, was told about procedures and the money wouldbe reimbursed by the 1st October, I waited,by the 3rd, I called, was given another one of their silly excuses, I called on the 8th October, was told money would be in my account today the 10, a few minutes ago check my account,rgere was no money,I called again,now I'm told the matter has been escalated and money to be reimbursed by the 13th, what the hell.... this is one of the moat useless banks I had to deal within my life, let rhem close shop if thwy have no idea what they are doing. Sies!!!?