Information including why the bank froze your account, do you owe the bank money, is the money for the pre-paid tuition in the bank, is it in an escrow account, is needed before an attorney can answer your question. You should seek a criminal defense attorney in your area who is familiar with white collar crime, since I am assuming that you are being charged with defrauding your customers of their tuition.
Nothing in this answer should be construed as legal advise and does not establish an attorney-client relationship without a signed legal services agreement
You need to hire a competent white collar defense attorney. Not sure what your question is, but either way, more information is needed to give you competent advice, like say, who is the prosecuting agency?