Bad Attitude and *********** Staff

My wife and I tried to attend the Prime Circle concert on Friday 07 June. We had booked about 4 weeks previously, during which we informed the ticket sales person that we had a R280 credit arising from a previous function that was cancelled by the venue. We paid in the balance of R120. The lady said all was in order and that the accountant would activate the credit. I received a phone call in the afternoon of 07 June stating we owed R280. I again explained the credit and was told it was resolved. We were barred entry on the Friday night due to non-payment. The manager arrived and got visibly angry with us stating he would let us in but then stormed off leaving us at reception. We left the venue without seeing the concert and without getting a refund for the R400 now owed to us. We will unfortunately never return. Could we kindly get our money back?