I am currently using K2, I like the ease of the component.
Still I have noticed that it has certain limitations, for example:

That would be excellent in the next versions of joomla incorporate a function to create contact forms.

Note: I hope this suggestion can get to the developers of this excellent component.

Also appreciate if someone could tell me how can I make this request goes directly to the developer.

I am pretty sure that there are several K2 extension for this.
Try looking at the JED or getk2.org/extend