SARS wont refund me

I was a contract employee for 3 months after graduating and was taxed an amount of R4500 on a total income of R18000 for the 3 months. When I submitted my tax return, SARS said that I need to come and verify my banking details, but they dont have my banking details, what can I do to get my refund?

You can only get your refund if you take the following documents to SARS: Proof of your address, certified copy of your ID and a three month bank statement. Once you give these documents to SARS they will update your banking details in 21 working days and then they should be able to refund you.