Ferrero Intern interview questions

Had a video interview which I aced after which I was invited to the next round. The interviewers did not contact me for an exact date for 2 months after which they called me to confirm whether I was still interested - I confirmed I was despite already finding another job in the meantime, gratefully. Once again they did not contact me again (presumably after their original choice declined their offer). Overall quite unprofessional behaviour, would not recommend.