Standard Bank Student Loan-Add over R40k in life cover debt to my original Loan amount

Standard bank student loan, when my parents and I signed our student loan agreement with STD Bank the agreement was that my parent would be paying the interest off while I'm studying then once I graduate and get a job i'd start paying the Original amount off without interest since my parent has been paying the interest, once I was completed studying I was shocked to find that my Original loan amount of +-70k had increase to over 127k and the reason was that there is a life insurance policy which was added to the loan and accumulated over the years with the original loan amount!? How is this fair my loan was administered since 2011 I started paying for it in 2017 and its 2019 now by the looks of things it will take me another 4 years to finished this loan. STD Bank How is that fair we paid the interest off while I was studying to avoid long term payments like then you simply add alife policy that neither I nor my parents knew anything about until it was too late.