Taking customers for a ride!!!!!

I purchased a belecoo 3 in 1 stroller at Makro online for R2999.00. The item was delivered a week later and upon arrival, the package (box) it came in was horrible and damaged. When I opened the box to inspect the item, it came about that the stroller was missing two front wheels. I immediately logged a call for the item to be collected and to be replaced with a complete thing. To my suprise a week later I get an email informing me that Makro will send me a refund. I called the customer service asking them why are they refunding me as I had requested the item to be replaced and I was told that the item was "out of stock". I immediately told the customer consultant that the item is still being sold and available but the price in now R3500. She then told me that I must re-order the item when I get my refund and will pay R3500!!!! How do I pay R500 more for something I bought at R2999.00???!!! I feel like Makro is taking me a ride and want to get more money from me!!!!! I want the item to be replaced at the price that I bought it with. If the item is "really out of stock" then why do you still advertise it (now with more optional colours too). Clearly your intent is to rob me off my money as you are now advertising falsely!!! I'm so angry at you Makro, fix this mess as I will not be paying R500 more!!!!