Icfai Tripura University — not allowing to sit for exams of 3rd and 4th sem.

Sir,
Myself is sunil kumar sah, enrollment no is[protected] of icfai tripura.
I had taken admission in mba program. I was appearing for 3rd sem exams. Two papers are left in 3rd sem.in between that period 4th years timing had been lapsed.
I had made call to its customer care for re validation of my enrollment no. But there are not allowing me to re-admit.
They are asking for fresh examination. I had not received any intimation that they will not allow me to sit for examination after 4 years.
I am a working guy of 40+ years. It is not possible for me reinvest around 1 lac rupee and sit for exam from beginning.
Please look into his matter and allow me to sit for rest of my exam after re validating the same enrollment no..