I've tried in the past like you to get on TC and I was unsuccessful. The truth is I tried sending emails to all the "big name" blogs and nada.
I learned a different approach very quickly. I found that if you approach the "small" blogs, they're much more open to covering you. Then using that small amount of coverage as leverage, you approach more well known blogs.
Doing that, I managed to go from not hearing from TC in one week, to having the top story on Yahoo UK's homepage for an entire day the next.
It wasn't easy, it was a shit ton of emails that I wrote, all carefully crafted and targeted to each individual blogger I approached.
In a month the site went from idea, to launch, to 440k uniques (racking up 2.6 million pageviews) to being sold off for quite a tidy profit given it had a very short shelf life.
Anyway, my advice would be to not to give up, just change tactics and approach the smaller guys first, build a solid foundation and work your way from there.
Also, take my advice with a grain of salt as I mentioned I'm no marketing genius.