One of the "advantages" of having the Pro Edition of Parallels is "Premium 24/7 phone and email support" However, support options appear to be limited to sending a tweet or posting a message on the forum. What is the telephone number for reaching a support person 24/7?
If you have a permanent license for Parallels Desktop for Mac, you are eligible for phone and chat support for 30 days after the license registration and email support for 24 months from the Parallels Desktop version release date. More info please find here https://kb.parallels.com/6571