Help needed

I am getting Hyderabad B Pharma but I have to get Pilani B Pharma (I have enough marks lead from the cut off), so what I have to do is whether I have to pay and then it will automatically upgrade or do I have to float first and then pay. Also please tell me about the career prospects of B Pharma Pilani. I am not getting any other tier 1 college, all are just private tier 3 college offering me computer or electrical. Is it worth taking chance ? my family can afford it. I think that I can do finance minor and can get a decent package