New Dolphin Electronics Vasai West Mumbai

New dolphin electronics Vasai west ,they are cheater don't trust them and don't buy any product from this place .My father who is Veg. vendor has purchased battery SF SONIC PC 1500 from them ,there was some issue in battery overheating and not charging properly so we contacted them as we purchased this product from them, they took our battery and after 15-20 they give it to us saying its working now and charge us 1000 Rs even though battery is still in warranty period and as per warranty, company has policy to replace it if it is in warranty period. The battery was still having the same issue even after servicing so again we called this guy ,they came took the battery ,now this battery is with them ,they even took our warranty card and not returning our product and card for last 2 months we are continuously doing follow-up but with no luck, in place of our battery they gave us some old battery to use till the time they fix issue but that battery also not working it was much older and