Thx for the warm welcome!
I was deleting duplicate apps (like stock calendar and google calendar) and only after doing that I discovered that google calendar has to work with the stock calendar in android 4.2.2
So, I think it was "calendar.apk" that I deleted but I'm not sure because I was looking for the stock calendar icon.
Maybe installing stock calendar apk will sove the problem but I can´t find the stock calendar apk for android 4.2.2.
By the way, the phone is a Kolina 100+ v6
Thx again!