Seller cannot supply item I purchased and has asked me to cancel the order to get refund, is this the correct way to get refund?

I'd tell the seller to cancel the order themselves by selecting the 'out of stock' reason if they've sold something they don't have.

Seller cannot deliver item and has asked me to cancel is this correct | Member To Member Support

Seller cannot deliver item and has asked me to cancel is this correct | Member To Member Support | eBay UK