My Photoshop says "Trial expired" but i pay annually

It only gives me the option to "buy now", however when i do that it also tells me its already purchased on my account so i can't buy it! When i try boot up photoshop from the applications it comes up with a tab that says "validating software license" and then closes a straight the way switches to photoshop then jumps straight back with "validating software license" it will continue to jump back and forth until i force quit the application.

I've tried uninstalling the lot and re downloading that doesn't work and it 100% says its purchased and theres no problems on my account etc! I'm so desperate for help as i have assignments that need doing!!