Marina Oxygen

Hi there can you help me I was banned from a store i didn't know why and I tried to fined out and now I was told that it is because I for 1 year ago got a QHUD from some one and if I wants to go back to that store then I have to buy the so called original QHUD it costs 1800 linden it is a lot of money, I think it can't be true that I need to buy some thing I never will use just to enter a land. What can I do ? I don't know what a QHUD is.