The person who invited you, how are you related? Was their a purpose behind visiting? Like a wedding? What did the person wrote in the invitation (you do not have to be specific)?
Since the rejection reason is "Purpose", that's I am curious about what did you guys show as purpose?
no wedding or any occasion of the kind. it is just summer and I simply wanted to visit my aunts, cousins and uncle. I have a new baby cousin that I wanted to visit as well. that's it. I posted my cousin's birth certificate as well. my cousins have not visited for a long time but my aunt, the one who sent the invitation was here when my application were processing. I was wondering if her visit could have affected the results.