Apple ID/ iCloud Security....Please advise
I have had my previous apple id for 12 years. My ex has someone hacked into my devices and my apple id. at this point I am replacing my phone with a new phone new carrier, selling my ipad, watch, macbookpro and will replace them when I can afford to do so. What I am asking is how do I best protect myself against an abusive, stalker who has previously compromised my devices. I finally left the situation. I just want to feel as safe and secure and educated as possible. Thank you.