Takealot messed up

I ordered christmas gifts for my kids online. 1 gift was correct and the other completely wrong. Log the return case online and after a day I get an sms saying the collection will be in 2 days. When I call to change the collection date the consultant tells me that I am getting a credit even though I specifically chose replacement online and all my emails to and from the consultant says this. Now not sure what is going to happen!