I think the case should be handle by one to avoid confusion and miss communication. one person to handle issues can be appointed who will look for customer statisfaction all the time.
Most of the time people dont read the rules and regulations on which the do the signature. few points such as loan amount, percent, Emis, No of cheques has to be higlighted and a photo copy is must and should be retianed with cutomer to so that he can have the prove for which is binded. after loan amount is scantion customer should get another copy of same bearing information cheques,Emis,Tenure,Dates,Forcolure charge and when can be the payment (i.e. after 6 or 3 months) so that customer can tally for which he had agreed.