Unitech Contracting and Engineering Services interview questions

Basic instrumentation things. They asked several questions for around half and hour and asked about the expected package. Then within few days they send you the offer and you accept it and thats it. They newer reply to your mails and when you call them says its still processing and after several months reply you that they cant hire you at the moment and cant say the exact period so if you like you can withdraw the offer. Trust me it took three months even to get that answer