The same way planning your business or family budget, planning is an important part of using BTCJam. Our credit score takes into account open loans you have and we try to prevent scammers from opening more loans before they've repaid old ones.
The best is for you is probably to buy a less powerful mining hardware, repay the loan and then try again with a bigger loan from the get go. Always makes sense to go a bit bigger than what you really need, in case your loan gets only partially funded. We should make this clearer in our user education and I will forward this to our product team.
ncsupanda, I'm sorry you've had negative experiences. Can you elaborate? We've come along way in recent months with our credit scoring algorithm and also now have more support resources. I'd love to hear your inputs in how we can make the service better.