As soon as an account has been activated on Stripe, there is no way for us to change the country of the account. At that point, the charge has gone through a specific gateway. As a result, it would be impossible to change, as handling refunds or disputes for the charge(s) would be broken.

The only solution is to create a brand-new Stripe account, which is set to the correct country moving forwards. Creating new accounts is also the only option for Connect accounts.