I expect the interest accumulating during a time you are delaying payment of the principle is a part of your contract when you took out the loan, and though not the best rate 8% is not an awful rate either compared to some consumer loans. I'm not sure other than making a request if you can stop interest accumulation of this sort ... I went through many cycles of delaying repayment of my student loans, and interest accumulated during that time period. I did refinance at some point, down to about 4%, but the payments will be going on and on for years to come ... mostly because I kept delaying the inevitable. If you can pay now, it is best to knuckle down and pay now. Get it done right away and you will pay less in the long run.
That is some personal experience, non-professional advice.