Argos won't refund Game Pre-Order due to it being through Sainsburys on Argos Card

Okay so, my fiancee very nicely reordered the new James Bond collectors edition for me. Unfortunately we noticed after she had already paid, that it was the PS5 version.

We tried to cancel, and went to support, but they said we have to wait until it arrives to send it back...

How can I contact them? I will try calling them tomorrow, but this is ridiculous?? The game isn't shipped for another 6 months, and by then the collectors editions will be gone