Why bard's e don't give an assist

I and a lot of other bard player face this proplem we made a portal for our teammates to help them to get a kill but we don't get an assist why? We help them, our help give him a kill and bard is support champ his only way to get gold is by assist. Riot please help bard and bard players and thanks. {{champion:432}} help him to survive please I like him.
Report as:
Offensive Spam Harassment Incorrect Board