I would contact Paypal.
This is from Paypal site:
Why is my payment unavailable?
If a buyer pays you and the payment isn’t immediately available, we’ll notify you via email or an alert in your Account Overview page. This email or alert will be the best source of information on why your payment isn’t available and what you may be able to do to help access it faster.
Here are some common situations why a payment you receive might not be immediately available:
You’re involved in a pending PayPal dispute, claim, or
ebay Buyer Protection case, or your buyer has filed a chargeback or reversal with their bank.
You have a limited selling history on
ebay or a Below Standard seller rating on
ebay, or we determine that there’s a higher level of risk associated with your account or transactions. For example, your account has an increase in
ebay Buyer Protection cases, PayPal disputes, or claims. Learn more
Your account has been temporarily limited because we’ve noticed an issue with your account and need your help to resolve it.
A reserve has been placed on your account.
We’ve identified a potential issue with a buyer’s payment and are reviewing the transaction. We typically complete these reviews within 24 hours. During this time, the payment won’t be available and we’ll ask that you wait to ship the item to your buyer until we complete our review.
You can log in to your PayPal account any time to view your payment status.
Learn more about payment status and availability.