Congratulations on your promotion!恭喜您升职！
要祝贺某人在某方面获得成功，可以直接说Congratulations on…或者说I congratulate you on... 如：Congratulations on your graduation /I congratulate you on your graduation.(恭喜你毕业了。）请看下面的例子。
Congratulations on your promotion! You must be excited.
恭喜您升职！您一定很兴奋吧。

I feel blessed to have your support.有幸得到您的支持，让我感到十分幸福。
feel blessed的意思是"因……而感到幸福/高兴"。让我们看看下面这个长例句。
I took the position of CEO exactly a year ago. I feel blessed every day to have the support of each and every one of you. Without you, our company wouldn't exist now. Thank you again for your hard work and support.
我就任首席执行宫一职已满-年。在此期间，有幸得到各位的 我感到十分幸福。如果没有你们，我们的公司将不会 展至今。因此，我要再次感谢你们的勤奋工作与大力支持。