CosmicCookielove You'll need to contact EA customer support both for the triple charge and to try to unlock your account. Issuing a chargeback is against EA's TOS, so it's no surprise your account was frozen; this happens all the time.
https://help.ea.com/en/
I would strongly recommend using live chat rather than email. If you don't see the option, choose a slightly different category of issue. Alternately, open the help site in a private browser window and don't sign in. Some of the options have a "continue without logging in" button, and those should give you a live chat option.