Consumer Redressal

What I want is that I have spent additional money on Xperia ZR and there had been problem with that phone. So instead of Xperia ZR i want ZL which I am getting it for about the same price as Xperia ZR if I include additional expense. So either give ZL or compensate for the amount I had spent on ZR. Sony Service Center guys are in talk with some guy name Avinash, according service center people , \"Avinash, says that I should take Xperia ZR and if it has a problem then I will get ZL\". My question if I take ZR who and how will you guys compensate the amount i have spent of ZR. If they can give ZL later why cant now.