how do i cancel playstation plus after my 7 day free trail
You need to cancel before the trial is up....Under account management go to services list. Select PS Plus then cancel.
I don't have a 7 day trial but I'm sure it's the same.
Settings > PSN > Account Information > Services List > PlayStation Plus > PlayStation Plus: 30-Day Trial (3 Month Package) > CANCEL AUTOMATIC RENEWAL!
easy right... and with all those loading screens it's quick too.