NIIT — delay in issuance of course certificate

I have completed my software developer course long back but unable to get my course completion certificate from this bogus institute. Dont know whether they are capable of educating students or not but the are definitely expert in training their staff in fooling people. Latest update i would like to bring to your notice... While asking for certificate i got to know that my books are dispatched now and will be receiving soon. Once received, i will be asked to give exams but they themselves aren't aware i guess that i have already given exams and cleared too.. Paying lacs of rupees and hearing this kind of new excuses every 15 days from new staff member is just not acceptable. I have been visiting branch, dropping mails and contacting them but all this is just a waste of time now. Mail ids i have contacted are : [protected]@niit.com, samir. [protected]@gmail.com, joanne. [protected]@gmail.com, nikita. Niitvasai.com, shraddha. [protected]@niit.com and many more. Also tried contacting mrs. Maria at vasai branch @[protected] but nowadays she has started recognizing my no. And ignoring purposely. Maybe she is hired to fool students and she is damn perfect at it.