If those figures are correct then you'll be paying off your debt over 3 years.
Was this a loan or a hire purchase agreement? Have you checked the small print of the agreement to find out what it would cost to terminate your contract?
In addition to
Kathyan's link to Consumer Direct, you might find it worthwhie to read over this
National Debtline factsheet. Both Consumer Direct and National Debtline offer free helplines.
If you've got other debts it might be better to look at your whole financial situation. You could make an appointment with a money adviser at your local CAB.
Good luck.