NIIT — Certification and job.

I'm an NIIT peeragarhi student enrolled in their course (professional programming in accounts and business analytics) in 2018 and my all fees are prepaid.
They've told me that the duration of the course, will be 8 to 12 months.
but they have extended this course so far, I have submitted all my projects.
and given both terms of the exam.
They never replied to mail regarding Certification.
also, I approach the staff to solve my problem but they avoid saying anything clearly.

details
student name = Ankit Kumar
batch code = B210138
user id = S[protected]
email id = [protected]@gmail.com