FNB connect call barring wasting my time

Fnb connect wasting my time, I took out a new contract talk max plan, worked well a few days, now this evening when I need to make some urgent calls I get a notification that I can't make calls when call barring is active, why is this being done, I need to make calls hence why I took the contract, I only took the contract out a few days ago and it's not yet month end so I can be in any breach of the 120 numbers or less than 15% incoming calls.

if this persists I demand fnb give me a refund for the time I cannot make calls, and refund me for the rest of the month and give me back my number I will port to another network, I can't be left stranded like this, I paid upfront for the month and now I'm being left in the limbo.

this is unacceptable.