did you read there emails and try to login into your account? well if not then login to your account and you will see what kind of proof they need from you... there is no one who can help me in this unless you read what kind of proof paypal want from you... so check your account and find out and scan the documents and upload the documents inside your paypal and wait for them to remove the limits from your account...
Check your account, it will tell you what you must do to lift the limitation, most of the time it is to submit some form of identification such as your driver's license, passport or utility bills. If the limitation is because of a suspicious transactions then you may need to send in invoices and proof of delivery.