Case got disbursed late in the night... New complications

So, the case got disbursed around 12 in the night and there were some last minute issues for which the bank took the liberty to make changes in the whole deal and disbursed it... Now as per them the changes are small but without taking the customer's consent... Not right...

Also, now since the month end is over, the bank people are not answering phone calls for some queries the customer has.... Again very low standard of professionalism....