Reserve Bank Of India [RBI] — for not accepting newer 1rs coins that are smaller in size

My name is tanu, i went to buy milk in the shop and the shopkeeper didn't accept the 1rs coin that are smaller in size as compared to old 1rs coins. Saying that they will not take it.. When i asked rbi has not given any notification regarding this that these coins are banned or not in use... They refused to take it.. This is done at lots of shops.. This situation is very serious and is creating only troubles for the customer... Where we should go... Coins are given to public from shops and is circulated within the market.. If they will not accept then where the public will go... It is so harrasing... And the result of denial is we are not able to buy things at a time.. I request rbi to resolve this issue... Either announce that 1rs coins are in use or banned on media.. So that these shopkeepers don't harrass people..
Address of shop - sahu bhawan general store, dudhimati, koderma, jharkhand. Pin-825410.