Here's your problem. Instead of doing proper A/B testing, you asked some clueless designer to "sexify it". Instead of thinking, he/she made it look like a typical spam email.
Also, most modern email clients block images by default. So your email probably looks like crap to most recipients.
However I MIGHT send you money if I thought you could improve my life in some way. And if you convinced me that you could make ME sexy, I'd probably send you a lot of money.
Whether or not you or your ads are sexy is of no interest.
I disagree. It is not easy, if not impossible, to go from ugly to beautiful, with A/B tests. A/B tests can make judgments on things, but they aren't going to make it much more beautiful. Making it more beautiful, and doing A/B tests, seems like the best approach.
The goal is to make money, not to be pretty.
Beautiful and efficient are orthogonal terms. They are pretty much independent.