Capco Senior, Consultant interview questions

Straightforward interview process, approximately four interviews over a number of weeks. First interview with a recruitment manager to establish the grade you will be interviewed for. Following interviews with a Capco employee one grade above what you are applying for, basic questions around your experience no competency based questions. Final interview with executives which was a repeat of the same questions from the previous interviews - Tell me about your experience, why do you want to go into consultancy, what made you apply to Capco

I applied through a recruiter. The process took 2 weeks. I interviewed at Capco(London) in December 2021 Interview This is my first interview review to any employer. I am actually writing this review just to let the people know how Capco treats when you are about to get the offer. 1.Interview process were smooth(3 rounds ) 2.Got selected for role. 3. Got a offer letter. 4.Accepted offer letter. 5. visa processing started according to HR 6. No updates for HR for 1 week then I followed up, HR they are working on offer letter 7. 2 weeks gone I again followed with HR and he said, he is working on it. 8. after 3 weeks again I did follow-up, now HR knew they need to tell me the hidden intention, now they said they can't hire visa candidates. 9. I have already mentioned to Capco recruiter and he said company going to sponsor. I feel waste of time and energy