Spend Limit on ********** 502 can't be increased

Cannot increase spend limit on ********** 502.

From yesterday, I have been battling to increase my spend limit on ********** 502 number, so that I can spend it on voice minutes, but to no avail. On calling Telkom, I am told I have a pending amount of R178, and hence I cannot increase spend limit. How it is that I have a negative balance of R178, while upon depletion of my voice minutes, I get cut until I either recharge or increase my spend limit to spend on voice minutes.

Now, I increased the spend limit on ********** 164 number, but I CANNOT make calls with this number, although I got an sms that I have successfully bought voice minutes. How does this whole thing works now.

Are the SPEND LIMITS on my account different for ********** 164 and ********** 502.

I need clarity, because I can't understand why I am not able to increase spend limit on ********** 502, but able to do so on ********** 164, but still can't but voice for 072 number, while all these will be debited from my account the following month.

Now, I am stuck with voice minutes I can't make calls on, on ********** 164, while I need these to be on 072 number for calls.

Please clarify and assist on this.

There has never been a time where my calls, upon depleting voice calls minutes I bought, continues to take on my spend limit ever since I have been with telkom. I always get notified that I have less than one minute left of talking time. After that, the call gets cut, and I now have to spend more on my spend limit or increase the spend limit in order to buy voice data.

How does, in this particular case, did I get to a negative balance of -R178 unaccounted for?