External Vendor support can be found below:
Apple
Link: https://support.apple.com/ipad
Miura Systems
Link: https://www.miurasystems.com/contact-us
Epson
Phone: 562-276-1314 ext. 3
Link: https://epson.com/Support/Point-of-Sale/sh/s5
Star
Link: http://www.starmicronics.com/pages/StarSupport
Bixolon
Link: http://www.bixolon.com/html/en/customer/technical.xhtml