Oh Marie bad luck for this to happen and the buyer be unreasonable too
She must be able to see you're busting a gut to try and get it sorted
If she leaves you a negative ( personally I don't think she will) you just put a reply explaining all.
I always read the replies to negatives and nine times out of ten the buyer has been unfair.
Ebay should police these matters more efficiently
Don't let this spoil your bank hol!
Hugs
Linda
xx