Seriously over-priced clothing, NO exchange, bad client experience

On 29 October I purchased a VERY expensive dress (for my daughter's wedding) from Occassions (yes, really - this is how it is spelt on their business cards and invoice). At point of payment I enquired whether it would be possible to return the dress, because I was not convinced this was the right outfit and would have to check with my daughter (the bride) first. Response from sales person / manager (Mandy) was, no return but that I could EXCHANGE. She seemed so very friendly when I was spending R7k on this purchase ... Ten days later, I found another much more suitable dress AND jacket, at HALF the price. I could only return to Canal Walk on 18 November. The dress was still in the original tissue paper wrapping and bag (not even taken out of the tissue paper or bag ever) with the original price tag still attached with white plastic thingy). Point blank REFUSAL from Occassions (MANDY) to exchange (or refund). Seriously chilly attitude and acid response from Mandy. A customer experience that I would much rather forget. I now understand from other stores that Occassions is renowned for over-pricing, also copying other stores' designs and ALWAYS refusing any return or exchange. I am now stuck with a very average dress, for which I paid MUCH more than it is worth and being totally disenchanted with OCCASSIONS.