BMTC Drivers issuing used tickets

Many BMTC Drivers and conductors (Mainly ordinary, pushpak and suvarna) are issuing used tickets. It works like this: I buy a ticket for say 30 Rs. Say I do not have change and I hand over Rs. 100 to the conductor/driver then he writes at the top on the back side of one ticket the amount he has to return me back (Rs 70). While asking for the money when it's time for me to get down, he will give me Rs 70 but keep the ticket, which he will issue to new passengers on the same route. This he carefully manages delaying updating his file where he needs to put in the ticket numbers that have been issued periodically.

This is happening at a huge rate and I am certain this will eat into BMTC's profilts. Every second day either I can see this happening or even at time I have also been issued torn tickets not from the booklet but from old tickets maintained cleverly inside that, or sometimes the conductors/drivers have refused to return my tickets!!

I would request BMTC officials to issue strong instructions to Drivers and Conductors in this regard. I have been arguing with these people for quite some time, but I do not think I can fix this problem myself unless I see some action from BMTC.

Thanking you,

Akshay