My iPhone 12 Pro have been hacked

my iPhone has been updated to the latest

version, but it has been hacked. Now show

the following symptoms: 1. since the

phone was hacked, the phone signal

and wireless signal are very weak,

compared with the previous full signal to

now only one bar. 2. I changed my Apple

ID and password several times but still the

same problem. 3. Hackers can change my

contents and get in my email.so my IPhone can be monitored and spyinghave checked the relevant information through the google. 4 whether I restore the original

factory settings. still can't stop hackers

keeps hacking my phone. 5 The most important thing is that everything I

said is true. I don't need to lie to everyone,

Because Cheating doesn't get any

benefit.and I'm not bored enough to joke

Thank you so much!