Everyone who posts on here about being limited always says that they had broken no rules. However Paypal do not ban you for 0 reason. What would be the point? They want folks to use their service as that is how they make their money.
However if you think it was an error then appeal...
Contact options for each countries Paypal customer services are accessed by clicking help/contact bottom left of Paypal pages.
1. Paypal phones (you can use the guest option if you can't log in).
2. Live chat is also randomly available.
3. You can send them a message, (during business hours you may also be able to message whilst logged out).
4. Have you considered contacting Customer Service via Facebook or Twitter?
You can send them a personal message from their Facebook or Twitter pages.
It's: https://www.facebook.com/PayPal and @AskPayPal for Twitter.
Advice is voluntary.
Kudos / Solution appreciated.