This sort of glass is also found in home decor stores and gift shops, and yes the quality is often good; large and weighty seem to feature too, and sometimes the design can be a little off (it just doesn't quite cut it).
I have seen retro / reproduction style glassware in the likes of Ikea, Asda
These places pile em high and sell em cheap, but I don't think they are actually trying to sell anything reproduction. They often have stuff designed specially for them (to the current year's in colours and styles) to the best quality for the price they want to buy them for and sell them at. Much as Woolworth's did in the past for glassware that has often now become collectable 4050 years later.
What you have bought is modern decorative glass; maybe you will get your money back, maybe you won't. Postage costs are always an issue with heavy items.