EMI calculation ?

Is my bank miscalculating something ? I took an education Loan in year 2013. Repayment period is of 10 years. Moratorium period is course period + 1 year which is 5 years. And repayment period starts after moratorium period. So it should start from 2018 and should end in 2028. But bank is saying that repayment period is ending in 6 months. Is there any mistake in there calculation or I am unaware of something ?