Telkom charging for services not rendered

I visited the Chatsworth Telkom branch 6 times. The first 3 were to try and upgrade my ADSL contract to uncapped. I eventually cancelled the process because no one seemed interested enough to follow up on my request. This took about 8 weeks. While shopping one day, about 9 weeks ago, I noticed that the store was quieter than usual and I went in again, I managed to upgrade the contract but there were no modems in stock. I was informed that someone will get back to me when they have stock. After going in to inquire a further 2 times, I still have not been contacted. Each time go in to inquire, I am asked to follow the queue again. The excuse is either that they have stock but are off line or they are on line but have no stock. In the meant time, I'm paying the higher premium but still have connectivity problems with the old modem.