DonisGood: Deep breath and count to 10. I think you're over-reacting.

Yes, it's inconvenient that you have to return it to the store you bought it from, but that's how it is and that's what customer service explained to you. You find many items stocked in one store but not in another, so the reason they gave is perfectly plausible. It's of course up to you whether you believe them or not.

And when you say that they are

"selling faulty products and refuse to take it back!!!"

that's clearly not the case, since they they'll take it back if you return it to the store you bought it in.