ProCogia Machine Learning Engineer interview questions

initially interview started with prescreening video interview, followed by technical and behavioral questions. cleared all interviews and got an conditional offer letter which was not discussed during interviews. waited for month and later they say i need to give one more interview with client , agreed to take interview . after couple of weeks called me and said that i am free to go if i have a another opportunity. cant trust procogia even after offer letter is released. Procogia took 2 months of time and gave me false offer letter .