failture to help a good paying customer and gettit

i purchased a laptop at the edenvale branch last year and the contract has a two year warranty of which i am still paying for the laptop and it is also insured. the problem began when my laptop stopped working i took it back to the store earl this year and they told me that my contract has ended in terms of warranty and that i should take the laptop myself to the sahara company to be fixed. then the sahara company ordered me to pay 8000 for my laptop to be fixed of which it is higher than the price of the particular laptop i am paying for, had to take it back to JD where they told me that there is nothing they can do about it as the insurance refused to pay for repairs. i am a university student and will be approaching exams soon so the laptop is needed as each and every month the store and the insurance company debits their amount i urgentlly need your help sir. thank you