1stopbedrooms didn't deliver order for 30 days, after I called and cancelled, then they shipped order. want over 400 to take it back. Brooklyn New York

I ordered a kitchen table and stools on 4/22/2023. The site said they would ship on 4/24/2023. The stools shipped on time and arrived. The table did not. I gave it some time and called them on 5/18/2023 to see what was going on. The customer service called the supplier and came back saying they did not have it in the warehouse and did not have an estimated ship date. I let customer service know that I had found it locally, and wanted to cancel the order. The customer service transferred me to someone else to cancel. They called the supplier to make sure the item had not shipped and canceled the order pending confirmation from the supplier. fast forward to 2/23/2023, I got a text from Fedex that the item had shipped. I called 1stopbedrooms who at first argued with me saying it hadn't shipped, but then acknowledged it shipped. I let them know I already purchased the item somewhere else on 5/18 and they need to stop this shipment. They refused and now want over 400 to ship it back. 2.25 per pound. and then 15%. I am disputing this with the bank, and reporting to Better Business Bureau. 

I also refused the order with FedEx, so the order is now back with the supplier.