Telkom Mobile data BS

I have a 10GB mobile data bundle contract with Telkom. Since yesterday, I have been receiving SMS messages from Telkom telling me that my data has been blocked because my roaming data has run out.

I am now at work in Claremont where I always have good Telkom reception. My phone tells me that it is on 4G. It is not roaming. I have 28GB available to me on my contract bundles, but Telkom doesn't allow me to access it because it tells me that my data is blocked because my roaming data has run out.

Explain!?