Lonmg Standing Top Up Service Fiasco

The Top Up system for purchasing internet data does not work. Yesterday and today I tried repeatedly to purchase data online but I keep getting a "Not authorised" as a message from Telkom. On add ocassions I get 15500 protocol error. In the past I have had the some problems. I have complained and sometimes I am actually able to purchase data. I look on the internet - including "hello peter" and I see that other people are having the same difficulties. In other words there is a long standing weakness / bug in the system and nobody at Telkom is prepared to sort it out. This is astonishing. I can do large internet transactions with Takealot, Loot, Zando and Bidorbuy, using my cheque card, but to buy a few gig of data from Telkom for a minimal amount is virtually impossible. I have checked the bank. The error is not on their side. The problem is with Telkom and their technical department's lack of concern to provide a service that works.