Cant take out a protect plan!?

Hi All,Had our ring for a while but finally decided its wise to take out the basic protect plan. When I got to my account via the mobile app, mobile site or desktop site - I end up in a loop of going to my account, picking a plan then ending up back at my account with "subscription required to play video" but nowhere to carry on a purchase!?Doing my nut in! Cheers.