What’s the name of your school? You paid 2500 euros out of 11,000 euros, how did you justify the payment for the rest of your tuition? Sponsorship? Irrevocable Transfer Certificate (AVI)? You mentioned your friends, from the same school? Did they get their visa?
For your first application, did you have a sponsorship?
Generally, reason 5 has no connection with the Campus France interview which is more related to the coherence of your study project, so reason 4.
At first glance, it seems to me that your problem lies elsewhere, especially your means of subsistence, and the payment of your tuition fees. Moreover, you don’t need to have a family link for a housing certificate..
Best regards