Kantar Researcher interview questions

I've been invited to attend an interview in December 2018. The interviewer informed me that the decision will be made by the end of this month and will let me know. I am still waiting for their reply!! No any courtesy email if I have been rejected or information has been provided. I can imagine the HR work and how they manage to pay their employees, if their work is like that. STAY AWAY from this company if you don't want to spend time and money!

After a presentation and an interview, I got an offer but they suddenly asked for my ID and then a few days they informed they would not offer a position to me. They certainly do a kind of background check which is I'm not sure, but I suspect they run and found that I previously reported my previous firm for not paying me income due. Ridiculous process and they didn't explain at all - just one text message that says no offer.