I don't think you can.  I had a seller once from a b&m store who didn't reply to any emails to give invoice for freight - I couldn't pay without it - and opened a UPI case instead of sending me the invoice.  I was furious, but I had the store's phone number so I actually rang,  and he tried through ringing ebay to get it removed and was unable to.  Ebay actually gave me a courtesy call and said once I paid the UPI would not be recorded on my account.  

So anyway, once she pays the UPI case will be closed and she won't receive any strikes.  On the up side, if she doesn't pay, you're 2 days into the 4 days it takes to close a case and you can get your FVF back, relist, etc, and paste her ID on the Wall.