Bests & Worsts Reviews from Amazon

I want to cancel the 7 day free trial and there are no links or information which will allow me to do so. Following instructions on Curiosity Stream says to cancel through Amazon account. Under my devices and video there are **no** channels or services to cancel. Amazon assistance says no account even though Curiosity Stream shows my $59.00 billing through Amazon. No assistance from Amazon or Curiosity Stream. If I was able, I would have never signed up for the free trial. This "FREE TRIAL" offer is a real rip-off!