Vasanth & Co — refrigerator whirlpool

We have purchased fridge in 2012 and warranty is for 5 years, and soon after warranty now fridge is not working properly and we have called service centre also, they are telling to spend 6k more.. If this is the solution why should we buy 3door fridge which is costlier and not worked properly even for 10 years.. Need correct explanation asap. We have not received correct answer while calling customer care