Belt will only keep the tummy in till you wear. It took 9 months to fet this tummy and it takes that much time to go in, tummy is not baloon.

No ... everything was normal... Can I use abdominal belt to tighten the tummy

It will take some time for C section delivery it is between 4 to 6 months once your body regains its flexibility you will be able to reduce weight also tell me were are you suffering from PCOD thyroid?