Apple India — repeated problem with bt/wifi/gps connectivity

Address: Mumbai City, Maharashtra, 400093

After replacing my iphone hardware in 2016, i have gt the same probem again in the second phone. Now the service center expects me to invest 26000 in order to get this sorted... So this is clearly some product fault... And am wndering why should i be penalised for the same...

Apple india sould take back my phone and replace it with new hardware iphone 6 and in case this is a perenial problem then exchange this with iphone 7 but give me a full refund/credit note for faulty iphone 6