Jawaharlal Nehru Technological University Hyderabad [Jntuh] — Tution fee in affiliated college IARE

Hello sir my name is sharath chandra.i am studying mechanical engineering in institute of aeronautical and engineering.i have joined the college through management quota in 2018.i have paid my four years fee in 1st year as package.i have detained after completion of my 1st year due to credits.now i am studying 7th semester in IARE.the college is asking to pay fee for my 5th year which i have detained and now my btech was completing in 5years.but there is no tuition fee for extra year in any other affiliated colleges.please give me a solution.my regulation is R18.