no dont withdraw... there is no need to.
Ebay will try let you sort it between you... if you do withdraw and you miss your 45 day window to launch the claim then you lose completely
that happens a lot with sellers from china etc they know theres limited time and it takes about 3-4 weeks for delivery... then another 3 weeks for the 'replacement' that never arrives... then its too late.
Explain that to protect yourself you HAVE to launch the claim, in order to keep within the
Site Rules and you will withdraw it when the goods arrive.
a claim does not affect her feedback or sales.
what is her feeback like?