Barksole defective hire of goods and bad refund practice

The rent out carpet cleaning machine that they knew don't woke but still hire it out. I took it and returned it immediately and asked for refund as it not my fault the machine was defective. Then I got a receipt for a refund they will be EFT so I was asked for my email address and Bank details which I provided still no refund valso they didn't indicate policies and then tell you after then is a R37 refund admin fee which you have ot accept or else no refund what to do this is ******ionate yet I had to comply but stil today no refund but lot is stories.