Is it my fault ( need ur advice )

Hi friends I was offered a position at HMC in Jan 2018 I was selected and had signed the offer letter after that it took 4 months for HMC to call me for medical I finished my medical and all other procedures the process was so slow that it took 9 months now in sept 2018 my documents were send by the HMC immigration for sponsorship change it was all 9 months I was anxiously waiting to join didn’t tried anywhere else coz I was happy I had found a job but I was shocked 😳 to hear from the immigration that my documents were rejected I rushed to the passport office to know the reason and the reason was they said the position u have applied is for qatari national and not for any other nationality now plZ tell me if this position was for qatari why they got me sign the offer letter and the process for which I borrowed money from all of my my frds since I was joblesss and now even I went to HR and they said we don’t konw it’s still in process I am left nowhere now is it my fault