Internet access paused message every 2 days minimum

At least every 2nd day I get this sms from Telkom when I turn my internet connection on: "Internet access paused. Either your data bundle is depleted or you're not in Telkom's coverage and using a Telkom only bundle. Dial *180# or open your browser." This is a 24 months contract and I still have about 15 months more to go with a struggle to connect to connect to the internet almost daily.