Unity Pro trial license problem

I just starting using unity for less than a week but today unity says my 30 days unity pro licence is expired. Clearly an error, so I tried and successfully re-activate for another 30 days pro trial but as soon as I hit “Start using unity” button same licence expired dialogue came up asking me to re-activate.
please help

ps. I really like to try our pro features before considering buy one.

We do not work for Unity and can’t help you. Please start a support ticket directly with Unity - they prioritize license issues.