Since you have it in a pot, maybe you have some ideas of what you ordered or purchased and where? I realize you're in Bangladesh! More info about what you thought you were buying might help us. Also, sometimes roses get mislabeled by being close to another's name alphabetically. For example, I was able to identify my mis-labeled Mount Shasta as Monet, partially based on the alphabetical similarity (long story on that one). As Seil said, the color looks like Black Baccara. It also looks a bit like Black Beauty, but again, the form isn't right.
