Still waiting on desposit refund for over a month

We hired hay bales for our wedding which we collected on the 09/04/2015. We returned them on the 13/04/2015 and our driver was advised that I needed to send my bank details on to them for the deposit refund. <br> <br> It's been over a month and I am still waiting for the refund. I have sent numerous emails and called them and I was told that it will be rectified and they will get back to me but still no avail.<br> Hawk Events And Function Hire's service and feedback is terrible and unacceptable towards their clients. I will never ever deal with them again!