Confusing plan downgrade system
I signed up for the Premium voice 2250 plan on trio sim. After first month trial I was billed for the plan renewal which was ok and the premier service which I didn't sign up for and didn't know I had. When trying to cancel this unwanted service I have also accidentally downgraded my plan to basic. How do I get back to the plan I actually want (Premium voice 2250) without the service add on (Premier) that I don't want. Can't find the option anywhere.