^^^ Yes, I tried to make sense of that reference number too. 'Fit360' seems to apply to several companies, although I couldn't find any that looked as if they'd be charging £79 for anything.
I'd not tried 'Fit360now' as a search term though. It now appears likely that either
(a) somebody has managed to use Jennyjoan's card to pay for this product
https://www.fit360now.com/product?page=7 or
(b) Jennyjoan (or someone using her card) has accepted the 14-day free trial (just paying £3.95 for postage). If that trial isn't cancelled before the 14 days is up, the customer is then committed to pay £79 for the trial product AND to £79 monthly thereafter. (See 'Terms and Conditions' at the foot of the page).