@Brendan: Thanks for the response. Yes it seems that I have to accept their new conditions on the new loan and have it gauranteed. Yes it is actually odd how they drew up the loan, I think it was because the old one wasnt interest bearing and the new one will be and they didnt exactly give me enough time to graduate but I think that's due to the max term on the interest free loan, I had to repeat one year and I'm also just finishing my masters.
I have discussed with my father and he has decided to guarantee it for me even though it's an avenue I really didnt want to go.
@Derek: Thanks for the advice and sorry for making this confusing, it's a bit of a mess! I havnt defaulted on any payments yet, the payments are due to start at the end of this month when the term interest free loan has expired and the loan is restructured. That single repayment was a bit confusing. It was in the contract of the interest free loan but I think it was just there for completeness, the bank has no problem restructuring once i have a guarantor.