Verification Code (PS4)?

I just don't understand, I was suddenly logged out of PSN acc, then logged in again, was also logged out again and it went on and on. I definitely suspect that I've been hacked. Will call Sony tomorrow and tell it.

I only have one question, it's about the verification code, which makes me feel insecure and also really strange when I send the verification code on my mobile phone or messages.

I don't get messages from Sony but from any and various phone numbers (also abroad)

Is that normal? Or should I enter it? I'm afraid of being hacked again.

Many thanks in advance and I wish you all a nice weekend.

I would change my password, and then change sony

Call Sony *