i am sure your sign your contract before you read and accept the salary. after coming here you change your mind while earlier you want to come here with any cost.
Finally you are here. and your present Employer mention everything in Contract. he paid every thing for your process. which you will not understand.
next time analyses everything you sign any contract. you not only wasting your time and money also your employers.
and type of you people can not stay happy any where. so stop complaining and find another job and go away. Many are in line to waiting for you go and grab your present job.