University Of Calcutta — Admission process

Dear Sir/Madam,
This is to inform you that I, Suranjan Dey applied for the 3Yr M.Tech in Electrical Engineering(EE-PT), Session:[protected]in the department of Applied Physics under Calcutta University (Rashbehari Siksha Sadan commonly known as Rajabazar Science College).I had been selected by the concerned authority and accordingly I received a telephonic call from the PG office of the C.U. asking me whether I am interested in joining the above mentioned course or not. I confirmed my consent of willingness to join the course immediately.
Next two weeks no updated notice had been published in the respective portal.On 9th February, 2021, an open spot councelling session had been organised by C.U. As I was out of station on 9th February, 2021, I could not attend the said councelling session.On the very next day, on 10th February, 2021, I reported to the PG Office of CU with request to give me a chance if vacant seat exists.On 15th February, 2021, I came to know from the office of PG studies that one (1) vacancy under UR category in this course still exists and I have been directed to apply further to get that opportunity.At once I did the same but my prayer has not been granted. PG office said first to get the consent of HOD of the dept. and HOD sir said, that is not his authority but the PG office's.
It is very painful to me that the concerned higher authorities did not extend their hands of support to get me the chance when the vacancy still exists and I being very much interested .
Kindly go through the matter and act accordingly.