The bed arrived in boxes, and when assembled, it turned out too large for the bed

I bought this bed for 550 riyals—two pieces, each two meters by two meters. They delivered it to me, but the delivery fee was deducted from my payment. Then, when assembled, it turned out smaller than expected on the bed—the bed measures 180 cm, while the bed frame is 200 cm including its packaging. Still, I placed it and covered it up. I’m selling it for 300 riyals. My location is East Riyadh, Al-Jenadriyah neighborhood. Please note: the price is fixed; only serious buyers should contact me.