Airtime Disappearing: Customer Care Unreachable

Airtime disappearance has become a norm on my phone. I am trying my best not to recharge, but forced to sometimes. Whenever I do, my airtime disappears mysteriously. I am unable to contact Vodacom through my cellphone to seek explanation because their customer care line is only automated. No opportunity to speak to the consultant. I am even thinking of a campaign to lobby fellow users to dump Vodacom. It was after a referred recharge that I checked my balance and noted that it was not what I expected. The other earlier recharged amount was way less even though I did not make any call, sms or data connection. This is really unbearable Vodacom, it is NOT.