How do I get access to invoices from more than 3 years ago?

Hey,

I'm trying to get all my accounts invoices together. However they only provide the last 3 years.

If you want more the Invoice Page say, "Invoice history can only be accessed for the previous 3 years via Account. Please contact Customer Support if you wish to access invoice history prior to this time period."

I've looked and don't know where to go to contact.

Thank you for the assistance.