Girias India Investment — I want to exchange the tv

Address: 560066

Hi yesterday i purchase lg tv in marthahalli girias showroom i do not liked it i want to exchange that and get samsung tv so the sale executive told me that once the bill is generated we can not exchange still they have not done tv delivery to my home please do the need full it not even 24 hrs executive says if you want to exchange you need to pay vat amount then you can exchange