Bonapolia interview questions

I applied online and was contacted via email to set up the first 30min interview. I wasted my time preparing and waiting on a call for 15min and no one showed up. I didn't get any further communication, no apologies, nothing, so unprofessional. I would avoid their little operation and look for other reputable staffing agencies instead.

Possibly a scam. The interview was very quick, only a short introduction about Bonapolia and how they work, then I introduced myself but at the end they say they only had one more question and asked for my NIF number, and that would be a mandatory information to proceed the application. I wouldn't feel comfortable sharing that info and they just finished the interview and apologized for making me "losing my time".