Lying to a customer never goes down well

On purchasing a Cielo Miles Beanbag chair for my daughter, I received the wrong item in the mail. I requested the return and replacement of the item and was email to say it was not available anymore and that they would credit me and if I wanted, I could have a refund. Being a relatively consistent customer on takealot, a credit is fine with me.

However the day after I get told they can not send me the replacement, there it is on sale AGAIN, for more than I paid. 2 People emailed me telling me that they can not replace it, the second saying that it has been taken off of their website as their supplier does not stock it. Yet there it is...

All I want is what I pay for, not to be **** to. If it is from another supplier (Which I will imagine is the excuse), I don't care. You sold me an item, and are continuing to sell an item you clearly have in your warehouse, but lie to me so you don't have to send me the one that I bought!!

Poor... do you lie to all your clients so you can sell the same item twice and just credit them to get more sales??