Bye buy vodacom Hello Cell C

I had a 2 gig data contract for my modem which expired and so I am on a month to month basis which worked well for over 2 years. However, I noticed lately (about 2 months) that I my balance reflects zero although I have data available as I can access the internet. Also, the data remaining on the last day does not carry over anymore. So, off I go to vodacom at the blue route to query this lot last saturday. I'm told something about an app and that I must put my modem sim into a phone to access my balance and thats that. Really!!!! So if vodacom can contact me and restore my system as it was I will stay with them. If not, cell c can offer me a free modem and 5 gigs(3 gigs night owl) for R99.00 a month, which I will take. Wakey wakey vodacom.