Shouldn't proper translation be "you are not helping us" ? Also helps a bit more to understand what me- does
Indonesian verb doesn't define tense, so it depends on the context, but I must admit some of the English part is strange :)
Me- is one of many suffix / prefix, which change into active verb or basically make it it more formal
In that case it could also be 'you did not help us'
Is the speaker imperatively telling another not to help him and his association, or telling that another that je did not help him and his association?