Never listen to a seller's excuses or promises when you have opened a return case or one for item not received.

You open a case,  it gives the seller 3 days to refund you or if relevant,  send you a prepaid return label.

If they don't you escalate the case,  eBay step in and force the refund.

Don't listen to delaying tactics,  just escalate when the time is up !

@chopthedog