If you transferred money out of your PayPal account to your bank account before PayPal reversed the payment then you may be left with a negative balance.
If this was a payment for a purchase of goods or services, you should contact the sender and have him or her resend the payment
And only way to solve this
contact paypal (weather the payment is reversed if yes ask the sender)
contact the person who send you the money
or add money to your paypal account by using credit card/check
for check transcations
PayPal
P.O. Box 45950
Omaha, NE 68145-0950
United States
Contact
1-800-212-3852 (Indian Toll Free NO Time 9:AM To 9PM From Mon to Sun)
Keep updated when the issue is resolved