Telkom Mobile Bad Experience

I have been dealing with the same problem for almost a year now, everytime I purchase any small amount of airtime I am never able to use it to make calls or purchase Mo' nice, free me, or even daily or hourly data bundles, the text message always says I have insufficient airtime although when I type the USSD *188# the airtime I have just bought shows, there is seriously something wrong with the Telkom Mobile network. There is no getting through to a consultant for customer services. Its just frustrating.