Telkom Is money Greedy

Got an SMS today stating that my account has been suspended. I called in to Telkom, and the consultant told me that my lines have been suspended due to a short payment of R70. I mean, what is R70 on a R4000 bill? I normally pay my account via the Portal, because on debit order, they deduct more than the Invoice amount. So for some reason, I missed an R70 payment, but my lines got suspended. As per Telkom, they don't have control over these things. It's system automated. Where is this going to end? The saddest part of it all is that they then black list you for missing a small amount like this.