Need support - lincese isn't working

[DS_10024912]

Who do I call or where can I fill out a support ticket.  

Support documentation takes me to products I didn't buy.   

[VladimirN · Accepted solution]

"Case Logger": https://support.ptc.com/apps/case_logger_viewer/auth/ssl/log

Article - "How to Create a New Support Case and Track an Existing Case on PTC eSupport Portal": https://www.ptc.com/en/support/article/CS67798

[DS_10024912]

No support for MathCAD 15

Please provide support since I have paid for the license but cannot operate MathCAD 15

EDIT - okay, I've hacked my way into creating some type of ticket.    I hope this works - but have a feeling I'll get lost in the black hole of obfuscation.