Vodafone India CC is clueless about my 3G data plan status

Yesterday I wanted to activate Rs 99 - 100 MB 3G plan on my Vodafone prepaid. I sent "Act MI100" sms. But I got replay as "RESPONSE_STATUS:1007: MI100 is already active on your Vodafone prepaid". I was surprised, but thought if its active, I would try to deactivate it first, so I sent "Can MI100". I got reply as my request received and status will sent shortly (But I didnt get any update for 2 days now). So I called CC.
First CC girl was totally clueless about 3G, and told me to visit Vodafone store. I again called CC, this time he said that deactivation message was received in their system, and in 3-4 hours my first 3G pack will deactivate, then I can again activate.
I also tried method about complaint form online. After giving complaint online, I got call in 1 hour, but the person said same thing, that my 3G pack will get deactivated, then I can activate 3G pack again.
Today morning I again called CC on direct number for 3G services. But the girl was again clueless saying that I dont have any data plan active, and told me to try *111# (which I had tried already) to check my active data plan. And *111# menu also replied that I dont have any data plan.
But still I am not able to activate 3G plan for MI100 by Rs 99.

I am not sure if Vodafone backend system has gone bad about my 3G data plan status, but their CC are totally clueless, and completely helpless for my issue.

I need "change"

I have recently seen decline in all sorts of change/coins. If we go to any shop, the cash vendor is very reluctant to give Rs 3~4 back in form of coins, instead they ask us to give Rs 1~2 so they can give Rs 5. But if they have to return Rs 5, even then they are reluctant, and ask us instead to give Rs 5 coin. Some of them are smart and keep Rs 5 currency notes in very bad/torn state, that we can't accept it, and give Rs 5 to them.

I asked several shopkeepers that why they don't give "change" back and give chocolates, to that he replied that they too don't get coins and have to "purchase coins" with 12~14% commission (to get 100 Re 1 coins, they pay Rs 112~114).

Why are we facing this scarcity of coins? where are all the coins minted getting lost? Is there some racket behind disappearance of coins?

I once heard from somebody that we can get coins in exchange of currency notes in bank, is such facility available at any banks?