TRYING TO GET CUSTOMER PAY EXTRA FOR REPLACEMENT STOCK AND LIE ABT IT!!!!!

I ordered a goolge home mini a few month ago. Unit stopped working, returned the unit back to Takealot. Order #***1 with description of product as 27 Aug 2020 "Google Home Mini Smart Speaker - Chalk (Parallel Import - OEM Packaging)" Then today I get this e mail after I told them i want a replacement: "We see that the preferred outcome you requested was for a replacement unit to be shipped to you. Regrettably, we will not be able to accommodate you at this time as we no longer have stock of your item" This was sent today 26 Jan and further more "Should we not get a response to this e-mail within 24 hours, a credit will be passed to your takealot profile." , then 5 mins later I got an e mail "account is credited" The best is yet to come, i log on to the website, they have the same model in Chalk and Coral for R100 more that I bought it for, but it's there..... So what actually happened here is the price has gone up and refusing to replace my order, so i must use my credit and top up the balance out of my own pocket. That is not how it works. I want my replacement unit. I will be reporting this to the CPA and issue you with a legal letter of demand.