NMMT Bus — Fraudulent bus conductor

I boarded bus number MH 43
H 5281. at 8'00 hrs from vashi railway station depo for dombivli (route No. 41) on 3rd June 2021. I gave ₹ 100 for my fare of ₹ 37/-. The conductor kept return change on hold under the pretext of not having change on hand at that point of time, When I saw that the conductor had enough collection to return the change of ₹ 63/-, I had to remind him three times to finally to get back only ₹60/- . He kept away the small change of ₹ 3/- which he did not bother to return. I observed he did the same with other commuters also.
Apart from this he was careless with the way he wore the face mask and has a habit of spoiling the currency notes by writing over them with ball pen.
Strict action should be initiated on such unmannerly, irresponsive social behavior and fraudulent personnel .
(I suppose the name of conductor is Mr Bhalerao ) my complaint can be verified by cross examination of other commuters travelling daily on this route.
I request to keep me posted with the Acton taken to root out such behavior.