Prepaid Taxi At Howrah — not returning money

I booked a prepaid taxi from howrah station at 6 am today (21.11.17). The fare was rs 202/=. I gave the person rs 500/ note and rs 10/, since i did not have two rupee change. The guy gave me the ticket and eight rupee back, did not give me rs 300 back. I was in a rush, people were waiting behind me and i forgot about the 300 rupee which i was supposed to get back. Later i remembered about the rs 300/- while in the taxi. I told the taxi driver. He said this is a trick these guys follow to cheat people. You have to ask them for the change, otherwise they will deliberately forget to give you back the change for large bills. I was in front of the counter for at least 30 seconds after receiving the ticket to arrange my luggage, if the guy was honest he could have called me. The taxi driver told me never give them large bills, have rs 100/- notes ready, give them exact or close to exact change so that they do not get opportunity to cheat you.