NMMT Bus — Excess bus fare charged

Address: Cuffe parade mumbai

Excess bus fare has charged by conductor bus no MH 43 H 5119 today I have travelled by the bus mentioned above from CSMT to world trade centre, cuffe parade conductor has charged double fare 30 instead of 15 saying that company rule to charge double fare.where remaining buses are charging only 5, 6, 10, 13 why the rule in nmmt useless bus services.