Did you actually receive a message from eBay that a cancellation was made and a refund is being processed? Then, refunds are not instant, and can take up to 30 days if paid by credit card to appear back in that card account. Refunds go back to original payment source.
If eBay haven't notified you of any cancellation and refund, listen to the seller no more, and one day after the item's last estimated date for delivery open a case for item not received, this way....
Go right of the item purchased, and from More Actions select.... I Have Not Received My Item.
If you are not fully refunded within 3 days, you must escalate the case on day 4 or within 30 days from opening the case, and eBay will step in and force the refund.
Do not close the case early for any excuse or promise the seller may give, and do not forget to escalate.
@nqgvq_75