Hello, I recently purchased 5,500 Lindens from the LindeX Exchange, at the rate of 280L per 1 USD. My bank account was charged, and I have yet to receive any of the Lindens... I dont even show up in my transaction history, except that I was charge 19.95, and shows no linden amount. What do I do, I'm worried that I just wasted $20!! Thank you for any assistance! , this is my first time buying too :/