Thank you for your answer!!
I have tried to do this exactly as you told me (which was the same that i had tried all the time) and i managed to get to the Stock recovery console more times than before.
If i choose reboot to bootloader, nothing happens (black screen blue power light on).
If i press back and connect usb also nothing happens, i hear a chime but the device in not recognized either by windows or the Android tool.
Either i am very stupid or the device is not working properly (i sincerely hope that i am stupid)