u/One-Operation-1842

Hi!
We are a Kazakh family of 6 people ( me, my husband and 4 kids). My eldest 19yo (turns 20 in July) studies in Turkey, 2d year of his bachelor. Rest of us currently in the USA, I am on F-1, and the other members are on F-2. My program has just finished, but we are planning to stay for OPT. Last year my son was denied for his tourist visa from Ankara in June, in July he was denied for F-2 from Astana and again F-2 visa was denied from Almaty in September. As his summer vacation is coming up, I would like to try one more time.
Is there someone who got similar case, or may be there are some folks who can share any tips or advice.
I’d appreciate any advice! I haven’t seen him for almost two years…