There's nobody you can complain to to get your money back from paypal in many situations, especially when it comes to receiving payments. If you use a credit card or have a bank send them money you have better options, but many people scammed by paypal have no recourse when they are on the receiving end of the money (which is the primary reason you'd have money held in paypal to begin with, as typically if you're sending it along you're not letting it sit there in the account).