My serial #, emailed yesterday after I purchased PSElements 2020, is rejected as invalid

[Guest]

My bank was charged the purchase amount yesterday March 25. I downloaded and installed epgrade from PSE 2016 to Elements 2020 (and organizer). The serial was emailed to me. When I launced, it asked to enter my serial#. I did so repeatedly by typing. I finally got into a messaging session that  failed. My issue was going to be escalated? But nothing. Again this evening March 26 trying again and it's a fail. Elements is running but only as a trial. 

[99jon]

Duplicate thread answered here:

https://community.adobe.com/t5/photoshop-elements/bought-paid-pselements-2020-yesterday-serial-email...