Pathetic Rain service

I had no internet connection from Rain.since the 28th September tons of emails.later I cancelled the service now they want to charge.me the full amount apparentlynI used 0.98mb for 02nd October. How is that possible. There is an automatic email we will get back.to you no one does. I will not pay R479.for.something I didnt use. Yet they are advertising Rain all over the internet. PATHETIC