Weylandts - paid for an item in stock and then deprioritised as a client

I bought a sofabed from Weylandts after enquiring about stock because we needed it by a certain date (our baby's due date).

19-Feb They quoted on an incorrect address 20-Feb They quoted on the correct address 21-Feb I paid the full amount 26-Feb I'm notified it's not available?

Apparently the two they had in stock was reserved/ordered by someone else. I find it challenging to believe that a big company like Weylandts could allow multiple purchases of the same stock, so I'm assuming my order was deprioritized to benefit someone else.

I asked if they can please suggest a suitable solution, if it's not possible to deliver one off the floor or negotiate with where they allowed orders in parallel. This was also not possible and I'm still waiting for my refund.

Very disappointed with the Weylandts service.