Sony India — sony xperia r1 plus complaint

Address:	Jamnagar, Gujarat, 361006
Website:	Amezone and sony

I bought new Sony xperia r1 plus from Amazon I can't access internet in this phone easly same Vodafone network easly access in my old phone lenovo vibe k5 plus I want to refund my money from Amazon because phone performance is very poor and very slow internet is almost not working in this mobile. First amezon company said we replace your phone but after replacement still I have face same problem I want to refund my money or complaints against sony company to release this type of poor products