I'm going to be brutally honest.
1. You should focus less on advertising and more on your personal development. Good products basically sell themselves. (I took a look at your store and I wouldn't buy any of it.)
2. Refine your brand. You have too much stuff going on, if you're going to sell templates sell templates. If you want to sell clothes, sell clothes. Pick one and build up a strong brand people can remember you by.
3. Less is more. Your ads are way too busy, when people are browsing through the marketplace...you only have a split second to catch their attention. If you have a hundred things going on in your ad, no one will know what is going on. (You have a busy background, you font is REALLY busy. I can't even read what it says half the time because there's something going on on each letter.)
4. If you've done all of the above and are still not selling...then maybe you should go back to building.