email going to trash and someone hacking my email and address book yesterday

I had a similar problem.  I have use a very robust password, so complex that NSA would have a hard time cracking it.  Nevertheless, my email (used only within the Xfinity site, not through a third-party email client such as Thunderbird) was hacked.  The hacker was able to get into that comcast email account and arrange for my emails to be diverted to a gmail account with my name as part of the account name (an account I had NOT set up.  I changed the password to another very robust password, yet that same comcast account was hacked once again.  I have sanitized my computer multiple times using state-of-the-art cyber security software.

I suspect that it was an inside job within comcast, although their support people will not even consider that possibility.  When one of their "Level 2" security people told me that their mail servers "are not hackable," I knew that she was not qualified for security work.  ALL equipment is hackable if it is connected to the internet--it is just a matter of how difficult it is to implement.  

I was very frustrated by the poor quality of customer support within comcast.  One of their agents even hung up on me when I asked what I could do to prevent that comcast account from being hacked again.  

I have reached the point that I can no longer trust comcast to provide reasonable email security, and I now have a highly-secure email account that uses 256-bit encryption both ways, domain authenticatlon, etc.  That account has already intercepted (and neutralized) multiple hacking attempts.  If they can do it, why doesn't comcast use similar techniques?  I think all of know the answer.