You have to little smarter when working on eBay. There are many SCAM s
happening with some people, so always try to go with eBay policies and
don't try to do any unauthorized activity coz, you will loose.
Normally PayPal is limiting accounts for temporally. After 72 hrs they
will close the account. SO, please talk to PayPal. I think you still
have a hope.
You just can't do anything about this, ask the buyer to resolve it. Make
contact with him and say that you can't give the refund unless he cancel
that filling. Is it showing as question in the seller hub.
You can't do anything until the delivery date pass, wait for it. If the
item didn't receive from that date, open a case. Sometimes sellers don't
reply for messages so wait for until estimated delivery date.