Please help me my phone was hacked they had live camera access. I want to know how they hacked my phone . My phone was very old it have android 9 . They had send a link which I click but I am not sure my phone was hacked just clicking on a link .

How do I know ? They send a email where they ask for money or they will released my video and people around me said that they seen my video and my phone battery also drained very quickly and switch off automatically.

What I suspect They must have install apk or payload in my phone via link which I click or via USB by having physical access

They had also hacked my wifi as they need to be in same network to have so much access of my phone .

They must be using Metasploit as they had access of my phone's camera , instagram chats and many more .

Edit 1 : I don't think my phone was hacked by clicking on link because nothing was installed and after clicking it never ask for any permission. My phone must hacked via USB installation .

Edit 2 : I never install apk from untrusted source or give any permission to any app

Edit 3 : This very serious as they had recorded my masterbation video and shared it in my neighborhood . My friend had said this that they received my video and many laugh at me when they see me .