Bed Frame King Size

I just bought a brand new bed base from EZ Living the Darcey model (not used,using the spare bed for now). The bed and mattress together make the bed too big for the room so I want to search for a slimmer frame. I can’t return to the shop as it has already been delivered 07/11/2025) and paid for. The bed retails at €700 (699 actual price) I’m willing to let it go for €590 ono. Genuine reason have the receipts of purchase and delivery. I can arrange delivery and fitting.