Tamil Nadu State Transport Corporation [TNSTC] — Not collecting 10 Rs Coins

I got into Vehicle # TN38N3541 and I asked for a bus ticket from Kmch hospital to Peelamedu and it is 15Rs.
I gave 1 10rs Note and 10 Rs Coin, but conductor returned Coin and said we are not accepting, in Coimbatore if Government person itself not accepting means where will they accept, kindly take action against this and I am travelling in bus right away on 30th July 2022. I didn't try to take any discussion with conductor as it won't be good.