Timothy Said:

how do I write a business solution letter?

We Answered:

I must say that you are in a mess. First one must see if the reason for the students to miss out on the trip and are not getting any refund is well founded, otherwise you are in deep trouble for fraud.
But if the grounds are genuine explain the truth to them by first stating the reason for this unfortunate incident and assuring them that you will be doing your utmost to see if you can find alternate trips at the company's expense.
It is always best to tell the truth from the start instead of cheating. If anything you can always ask them round to explain to them personally your position and show them your cooperation and understanding.

Tracey Said:

How do you write a business letter? Please help!!!?

We Answered:

It is similar to writing an essay. Keep it factual, and to the point. In this letter you have two issues to be resolved. In the first paragraph state that the bank was running a promotion and offered free check when signing up for a new account. You account was charged $X dollars and you need that charge reversed. Also, the checks were printed with the name Doe John instead of John Doe. Please fix this error and rush out a new set of checks free of charge.

Finally end with a sentence similar to this:

Thank you for expediting this matter.

Good luck. I am sure it was just an error and they will make it right for you.