Bad service for a damaged product

I ordered a steel cabinet for my holiday home. It took three weeks to get shipped and at the time it arrived I had gone home. It was received by the rental agent and not opened or used as it was packaged as flat pack. This was never indicated on the website that it would need assembly. When I arrived back 6 weeks later, I found the packaging and panels damaged. I tied to log it as a return on the website, but it does not send you a code via e-mail. I sent an e-mail with the reason for the late notification and photos of the damage and was notified two weeks later that two month have expired since receiving it and that I can send it back at my own cost for them to help assemble it. This is unacceptable and I demand a return and full refund. They sell the product but then blame their supplier. Dont do business with them.