Request for refund

I ordered on Friday, they replaced my orders with unwanted items, I requested the packers while still packing to not replace the items with what they replacing with, i and courier went to back to Bakenkop Engen garage to get assistance because that's where I ordered, they couldn't assist me but claimed it will be refunded I then bought the items in the store of which what I ordered was in the store. I request chat bot for assistance it kept on saying they will get back to me in 2 day. Even today I haven't been refunded.