Been told I've been hacked

[Keef3]

I received this email from my own email account it hacked my Instagram account and my Netflix and has tried on several occasions to take control of my Facebook account how do I stop this onslaught 

[MOD EDIT: Subject title changed for clarity]

[用心棒]

Did you follow the advice here, My Virgin media email has been hacked | Virgin Media Help?

Consider migrating your email needs over to a service with better security, i.e. multifactor authentication, and then assign this email address to the online services under attack; also enabling multifactor authentication on those online service.  

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[Paul_DN]

Hi Keef3,

Thank you for reaching out to us in our community and welcome, sorry to hear you have been hacked, is the Email one of ours, are you still an active Virgin Media Customer?

Regards

Paul.