Booking.com Customer Service interview questions

First I did an online quiz, then a phone interview followed by a full day of assessments and skill tests. I was offered a job and was told I would start in about one months time but they never called back again.

Had 2 interviews-one phone and one in person at the assessment centre, where a group of us was given a company introduction, then we did a language test followed by one on one interviews. Was told they would call everyone with another phone interview for conversation skills and to make sure we were free between certain hours across 2 days. They never called. Eventually end up getting a rejection phone call saying that I didn't have enough call centre experience. My experience is something they easliy could have figured out from my CV, online questionnaire and initial phone interview. Perhaps HR shouldn't address interviewees in such positive/definite language i.e. "we will call all of you for the next phone interview". Also, if you aren't going to hire someone based on experience then don't have them take 2 interviews. Now I feel like I was just making up numbers.