Consumer Redressal

I have purchased "NOKIA Lumia 520" on 17th Oct 2013, to gift my son SIDDHARTH DEY, as he had just joined "Presidency University", and spent Rs.10,000/= on the set, and after exchanging old NOKIA set, I was charged Rs.8,700/=. To my utter dismay it started giving problem since February 2015, and visited Capital electronics first (where from it was purchased) and then other NOKIA Service Center in Golaghata (next to VIP Road), Lenin Sarani, and then Gariahat - all had standard answer that NOKIA don't manufacture this model any more and they are unable to correct lacunae, if any. Unfortunately the said NOKIA 520 was launched in 2013 only However, on checking at NOKIA store in SaltLake Sector-V, "NOKIA Lumia 520" was accepted on 18th April to set right the problem - received phone call within a week stating it may cost Rs.3,000/= to repair and my son accepted it too. But on 7th June 2015, after more than 1.50 months - the phone was returned to us, stating it can not be set righ