My plan was changed without my consent

My plan was changed without my consent.
my billing changed and the store features changed without my consent.
Dominic from the support made this changes on his own decision.
I am trying to contact the billing team for 3 months to fix the problem with any success.
it is not legal !!!
It is a scam , Shopify billing team doesn’t what ever they want with my account payment and there is no way to contact them or the legal department!!