Calicut University — Original degree certificate delay

Address:

kandamkulangara house, vettikkatiri (P.O),cheruthuruthy, vettikkatiri

Sir,
my name is bamitha balan. i have completed my degree in the year 2014 from co-operative college ottapalam. my register no: OTALAEG012. I have paid rs.275 challan no:1842130 on 10/03/2017 from university treasury to get the certificate still not received. i have contacted the university in almost all the numbers i received from website, not even a single person helped me with my issue. I want an updation of what is the issue with the certificate delay? do i have to pay more?
please update me.
please find the attachments of provisional certificate below.