You should be able to lodge a Paypal dispute on the transaction, and get a chargeback so you get the money back, unless you had sent it as a gift to a friend/family.
Don't mater if is as a gift to a friend/family.
I don't believe you can do a dispute on Paypal if the transaction is sent as a gift, or at least not from what I can see. If the money is coming from a bank account, or card, you can do a chargeback by contacting your bank.