Incorrect order

I ordered a set of pyjamas from Mr Price online. The order got delivered and only to find that what was delivered was not the pyjamas that I had ordered but sneakers so they messed up my order. I immediately contacted them with regards to this issue and I was informed to send an email and I will get the assistance I then emailed them and a lady by the name of Thembeka Duma said that she has arranged for the parcel to be collected and corrected one delivered but till date I have not been contacted. Today I reach out to Mr price whaWhatsAppstomer care and had a chat with precious who is now telling me to take the parcel to the store and exchange it there. How do I return an item with the correct invoice but the incorrect item? I feel like I am being given the run around now and need this sorted asap