Last time that happened to me I just deleted the font and switched to a system font like Arial for the whole deck. Cost me an hour but at least I knew it would work. Now I always check the embed permissions before I even start laying out.

Missing half the letters sounds more like a bad download than some big scam. People make mistakes when packaging files all the time, happens every day. You grab a free font off some random blog that was thrown together in ten minutes, you get what you pay for. Its not like someone sat there scheming about how to ruin your document by leaving out the letter Q. Probably just sloppy work by some guy who didnt check his folder before zipping it up.

Yeah totally agree with @kevin_murray88 here. I mean if you're pushing past 500 degrees on the pizza stone you're basically asking for a burned bottom and raw dough on top. Maybe it's just me but I'd rather have a slightly slower bake than eat charcoal.