Unprofessional service

Last week and Thursday Dischem online and app had to the Huggies value packs Priced at 179 and also a buy 1 get one free , order was placed and paid for successfully the Friday morning I woke to email stating that I was refunded to the store I chose to collect at not having the size and quantity.. the evening Dischem released a statment advising that they had a system glitch in the price and promo was incorrect and that we would be refunded , however unfortunately the system glitch is not the customers fault and we all know what the customer see the customer pays , I’ve sent them a email with my concerns regarding the statement and also the lack of there customer service in not even trying to meet the customer half to apologise for the inconvenience caused by THERE SYSTEM GLITCH they have not responded since and refunded me I do not want a refund I want the item purchased