State Bank Of India [SBI] — wrong remittance of overseas education fees

I have taken an education loan from your alibag, (Raigad, maharashtra) branch. My son was to join michigan tech university in the usa. For remitting the fee for the fall semester, i received an advisory note from the university giving details of the payment of fees (Usd 10126.00). By wire transfer, the fee was to be sent to the associated bank, wi, usa along with the details of the student and the university. The associated bank in turn would remit the fee to superior national bank in michigan, where the university is a beneficiary. They had provided account numbers in both the banks.
In my absence, the sbi staff asked my son the details of payment in spite of having provided the payment advisory note to them.
My son was obviously not conversant enough in these matters and as a result, the fees were sent to the asso. Bank with the account number of the superior national bank. This transaction was done on 16/08/2017.
My son reached michigan tech univ. On 23/08/2017 and found out that the fees had not reached the univ. We tried desperately to locate the whereabouts of the amount but were not successful. At the last minute, on 04/9/2017, i went to the bank and directed the staff to remit the money again correctly through my own account. This time the fees were successfully deposited with the univ. And my son's admission was confirmed.
During this period, we all went through a cruel mental torture with little help from the sbi alibag staff to resolve the issue.
The money from the first transaction is still missing. I have done a number of attempts to recover it. I have also contacted the associated bank and was assured that the money had reached them but was returned to the source bank by them due to wrong and/or insufficient forwarding information.
Since then, i have been running from pillar to post to recover this large sum of money which i have lost due to sheer incompetence of the sbi staff looking after the loan section.
It has been more than a month since the first remittance.
Please help me get my money back. I can provide every detail of the process if required.