Now feel like a bit of an idiot so hope someone can advise.

I was looking for a car and saw one i liked on ebay, emailed the seller (business) who asked me to call them so i did, they said it was good a bargain they were 100% genuine sincere etc, told me if i wanted it i would have to be quick or it would be gone. It was advertised with new mot, but during the conversation i was told a desposit would be needed to secure the car plus get an MOT on it. I foolishly (looking back) paid the deposit via bank transfer. At no point was i told the deposit was non returnable.

This was thursday. On friday I was involved in a car accident resulting in leg injuries etc, i spent 2 days in hospital. Monday morning I emailed and called the seller to explain I couldnt complete, they said ' i suppose you want a refund' i replies yes, they stated it would cost them money to relist it i said i understand, deduct the £15 relist fee. They mentioned no other costs and as the car was advertised with a new mot there would / should be no other costs. They promised they would make the refund tuesday morning, this was via a telephone call on monday, no refund was made, On tuesday I sent them an email asking what was going on etc I had a further 2 emails saying the refund would me made tommorrow (wednesday) and a further they would be in the office from mid-day. i still have had NO refund.

Where do i stand what can i do? they have acknowledged the refund said they intend to pay it not paid it..