I thought I was texting Apple Support. It was scammers

I was using the Apple Support App from the App Store. I was surprised when the reply was what is AppleID. I said if you don’t know what that is then who are you. The reply was shocking. The reply was “Heehee”!!! Was that their name or were they laughing at me. I’ve no idea! Since then I have had to change my password at least three times a month. My passwords that I set for apps including a NHS app sent from my doctors generated a disgusting password much included male body part, an animal urine and another word for female body part!! This was sn app that I was using to check out my hospital visits !!! The nhs helpline said the password wasn’t generated by them. So who AI? I’ve no idea. I am also getting privacy warnings on the WiFi in the settings. I keep resetting the password on the network and it disappears. I found the fake scammer number pretending to be Apple support in my phone contacts. I must have talked to someone in person after the support fiasco. This was last year. I have now deleted the number when I saw I had saved it. I believed they were genuine. I don’t know what is going on. I do update the iOS software regularly. I’m tempted to change my phone but I don’t like android phones. I’m at a loss to know what to do. Anyone know what’s going on. Scammers please do not reply