Worst customer support.

I recently did an upgrade with MTN, and I got all this data from them. everything was working fine, until this Friday. I've been offline since, and I have 8GB left. I've been trying to call them, and I'm trying to understand why the data is not working cause the network connectivity is working fine. I've tried calling, and calling from the start of the weekend but no one is answering.

They have the worst customer support.