Telkom Mobile Balance Issues

I am on the Telkom Mobile pre-paid service. When checking my balance using *188# it states that I have R27,77 available but when trying to make a call I get the "Your balance is insufficient" error message. SERIOUSLY!!??

Interestingly enough, I don't have the same issue with my Vodacom or MTN service. So Telkom, are you going to fix this or should I just switch to the competition?