Yes I did. I was also sent the policy document which stated they will reimburse me for the flights/accommodation/food. I also have the email communication with their recruiters which said that they will reimburse me. Do I have to get a lawyer?.

Sorry to hear about your troubles. I've always had the interviewing companies pay for the tickets on their end and they (or their travel agents) would send me the confirmation email/tickets.

Didn't know some companies are asking to pay for it yourself upfront first - definitely makes it more risky…

Perhaps look into small claims court? You shouldn't need a lawyer for that.