Worst Customer Expirience

When you get to the hotel you are requested to pay a holding deposit of R500 which is meant to be refunded when you check out. I haven't been refunded my deposit back after checking out. The 1st time I followed up they requested my banking details and confirmed that the refund will be processed withing 7 working day. when the 7 days passed, I followed up again only to be requested my card number and expiry date of my card. why would they need these details especially when they had already confirmed that they have procced the payment? They are a **** .... don't walk runaway as far as possible