Poor service, long queues and always out of stock

I have been with Telkom Mobile for 2 years now, and I can count one time where they were quick to help without hassle, and it was to change ownership of my contract. Every other time I went there, I found people lined up in queues until outside the shop, and when you inside, it is so crowded, you can't move without bumping into another customer, and its the second time that I experience a struggle with stock. For two weekends in a row (2nd of January 2016 and 9th of January 2016) I have waited in such a queue again, with ONLY ONE ASSISTANT IN THE SHOP on the 2nd of January, just to hear that \We have no stock