I think it's VERY unfair that Cell C just throws away whatever is left of your data bundle after 30 days. To add insult to injury, they don't even let you know that your bundle has expired, and just greedily start using your airtime to pay for data - at a hellishly expensive rate!
One day you have airtime and data - suddenly, the next day, everything is on zero. This is totally unacceptable.
Cell C, please change your policies right away!
Firstly: If I buy data, I'm entitled to continue using it until I have finished it - not when you decide to take it away.
Secondly: Notify me when my data bundle runs out! Don't just dig into my airtime!!!