Vodafone — malpractice of balance deductions

Vodafone india on a regular basis has been involved in deducting balances from the customer's account.

I have faced this in the past many times. I need to pen this down once in for all. I was in uk for early part of this year. My main balance was minimal as i was aware of hefty international roaming charges.
Vodafone used to call me /text me on a regular basis to recharge with the international roaming pack. Since i was on a local network in the uk i did not pay attention to it.
One day all of sudden i get survey message from vodafone and message read as "all texts are free". I went ahead replying for 3 messages.
Boooom!!. It took no time for them to reduce my main balance account to negative 3 digits for latching onto there network and sending out messages (Remember in their message itself it was written "texts are free").
When i came back to india i recharged with 149 which went in vain since i cannot use their talktime unless i clear my main balance negative.

I thought to give up on this and clear my main balance only as vodafone customer care as useless and apathetic as only they can be.

Recently i recharged with rs 79 which includes 64 rs talktime and other benefits of data. I thought rs 64 would be deducted from my negative blance. Nope, rather they include this in secondary balance which can be a case i agree. My point is where they have informed about this in their website? If they haven't included in their own website, isn't it a case of misleading?