So I just got Dark Souls like a week ago and I just got a heavy crossbow but I can't find any ammo for it. I keep reading online that the male undead merchant and that Andre of Astoria sell them but they don't. Well Andre doesn't and I'm not sure about the other because I killed him before I knew what was going on. The only thing I can think that I'm doing wrong is that there is some update that I don't have because I don't currently have Xbox Live. Is there something I need to do or is it a glitch or what?