My ex hacked my email and excepted an invite to a family group.

My ex sent me a family invite and I didn’t expect it. He ended up hacking my gmail account and I excepted the invite. Immediately a home app started and he is hacking my life. I made a new gmail and Apple ID but even now with changing my entire modem and passwords, it’s still showing he has a connection to my phone. I emailed gmail and they said they can’t verify my account but that is because he changed my stuff. It’s to a point I hate even using my phone. I need to get him off my stuff. Yes, he had access to my phone during the time it happened but I had a passcode. My phone has this home app that he controls and he has something that’s a home hub on my Apple TV, iPad, all our phones and electronics. I didn’t agree to this and I’ve tried to get it off my electronics. He works at LinkedIn in security so he’s smart. Please, I need help. He had three family members that worked at Apple and it’s showing their contacts on my home hub app too. I never initially set any of this up. How can I remove his access to my life. I can’t even change stuff because the prompts tell me my Apple ID doesn’t match the one that’s being used. That’s because I haven’t had control of that email or my hotmail he hacked. Please I need someone to help. I’m a single mom and I need to know we’re safe. What can I do to get the information and details about what’s happening

[Re-Titled by Moderator]