data keeps on disappearing immediately after recharging

<p>This has been by far the worst experience to date! Lately after recharging with data my data would just disappear to a point where my airtime would also get affected. This has been happening for the past 2 week's now. This is all new to me as this has never happened before. The call centre can't even explain why this keeps happening. I'm now even scared to recharge for fear that my airtime and data will disappear. Soon I'll be forced to change networks. This is horrifying. I want all my data reversed as I never even got to use any! And I needs this issue resolved! </p>