hacked

You'd have to prove Cox was liable.  A good indicator of proof would be if multiple accounts were also hacked.  If only your account was hacked, you'd have to prove you had an effective password, hadn't clicked any suspicious links, downloaded questionable software and had implement all reasonable security measures, such as 2FA, OAuth and keep your software up-to-date.

Did you have 2FA with your bank?

You indicated both your Cox email and your bank account were hacked.  Did you include your online banking credentials in an email?  How did someone hack your bank account from reading your email, even email from your bank?  While someone could have obtained your private bank account information, there wouldn't have been any security credentials in a bank email that could have been used to grant access to your online banking account.  Banks also require some type of security verification for password resets, to prevent social engineering.  That information wouldn't be in an email from your bank.  Cox email and your online banking are unrelated.  The comon factor is you.  Does someone else have access to your bank account or your computer? 

Why do you think your email was hacked and forwarded to a hacker's email account? 

If you haven't done so already, contact your bank Monday morning to notify them of the wire transfers from your account that you or another signer on the account didn't authorize.  Ask how/when/where the transactions were initiated.  Schedule a time to be informed of research results and, if no bank or customer error is identified, when they will notify the FBI.