ONLINE BUYING NIGHTMARE

We placed and paid an online deal on the 30th of October 2019 for a Midea 28l Silver microwave. They said online delivery will between 2-5 working days. We received the microwave on the 6th of November 2019, only to find the send the totally wrong microwave, they sent a White 20l Midea microwave. We phoned the online team on the same day where they said we had to submit the return online, we did so immediately giving the reason why we are returning it. On the 9th of November a Martin Hlongwane sent an email asking us again why we are returning the microwave????? We phoned the customer care on the 13th of November and spoke to a Phindile, Phindile informed us that the product was purchased through a third party namely "Market Place", which actually shouldn't have any effect as we bought it directly with Makro. However she said that the "Market Place" will phone us back within 2-4 hours, it is now the 14th of November 2019 almost 24 hours later and still haven't received any phone call. We also asked Phindile how long this will take just to return the microwave so that we can get the correct one (the microwave is purchased for our company and is used on a daily basis), she said 7-14 working days???????? First of all we received the incorrect parcel and now it is taking forever just to return it????? We also sent an email on the 13th of November stating the issue and we need urgent co-operation, but still nothing.