Netflix complaint: Unable to access account for almost 2 months yet I was billed for that period

I signed up for Netflix in the month of January. It was a mandatory that I provide my CreditDebit card information to sign up for the service and was provided a free trial for 1 month after which I should be billed for the subscription I opt for. To which I opted for the 8.99 monthly subscription.

However, don’t know when my account email address was changed without any notification and I couldn’t access the account after a month of free subscription although I have been billed for those months.

When I notified customer service about this issue, I was said that they can revert the email address so that I can start using the service but couldn’t guarantee if my account was being used by any other person.

When I asked for a refund for the non-usage of the account during my billing cycle, I was told that the system doesn’t allow to issue a refund and instead I should be asking my bank to cancel the transactions. This really isn’t acceptable.

When I have not been using the service after my account email id was changed, why should I be billed?

I have already asked my account to be de-activated, but would like to have a full refund for the period billed for