Dear Concerned,
This money has been taken by this mediator and seems that the complete one lac has been paid by the opposite party to this mediator. However as the terms and condition of the Divorce the 1 lac money has to be paid - in reference it is better that - you file an execution petition in the court to instruct the opposite party to pay rs 1 lac to you as per the agreement . At this stage when notice is sent to the opposite party the opposite party might help you to get your 90k rupees from this mediator as they would have paid him.
If there is no written document that this person has 90 k rupees then it doesnt seem that any action will be taken by the police on the FIR
Best of Luck