Sims 4 Purchase issue

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.