Cancellation request denied after buying in error

[0geoff0]

My child accidentally bought a buy it now item on saturday evening whilst messing with my phone, I noticed and I  requested to cancel within 5 min of buying, I have not paid any money yet. 2 days later my request was denied , saying it was already posted. I have not receive a dispatched email from eBay to say it was despatched. Now the seller is ignoring my messages. What is the best way to resolve this issue? 

[tobiasd4]

Now item has been posted, nothing you can do.

If it was UK business seller, you can return for refund, you pay return tracked postage.

Change password & log out of ebay if not using it, surprising how many, children, cats, dogs, etc buy items on ebay.

[arkwebus]

o/P seems to say he has not paid and seller has sent

[0geoff0]

Yes, That’s what they told me. Strange.

Sent from my iPhone