My iPhone was hacked
1 or a few months ago smbd got access to all my contacts and telegram account (which is impossible to open just with my
SIM card)
! I have never lost my phone and I’ve never left it without my attention, and it was brand new.
What makes you think this happened? Almost every "hacked phone" report here can be explained by some feature designed into a phone or Apple's system that the user does not understand. It is also possible to hack a phone outside of Apple's system if you use the same password for other services and they find it that way.
If you think your Apple ID has been compromised - https://support.apple.com/HT204145.