Put the battery on a charger. Is you charging system working on the car? It's cranking over once it dies or you wouldn't know it won't start, so you obviously have enough juice to keep the ignition running if it has enough power to crank the engine, right?

Also, if it wasn't running like this when they checked the compression before, what good are those test results? You need to get test results from what it is doing now. You may have flattened a lifter or wiped out a cam lobe. That is not uncommon in these days of reformulated oils.

Do a compression test and post what the compression test results are? This will indicate the general overall condition of your motor right now. With only 200 miles on it, something could have gone wrong. Ask me how I know....

Do you have the tools and such to trouble shoot any of this? If not either find someone who does and knows how to use them, buy the tools and learn how to use them, or take it to a shop.