Terrible service at Kollonade Branch

On 29/11 we went to the store to renew our telkom mobile contract (running for 2 years). The sales lady Yvonne assisted us. She confirmed they had stock (Huawei 8). We completed the paper work - she confirmed we will get feedback within 2 to 3 working days. Never happened, I had to phone the store could not get through for hours. Eventually got the centre security to go to the store. Tried again and again and eventually got through. Asked why she did not contact us it is now 4 days. Gave every excuse in the book but she will get back to me the same afternoon (this was Thursday). Never contacted us. This morning after again trying for 4 hours, I got through and ask to speak to her. I overheard her telling the person who answered that she is day of. I insisted on talking to her. She then answered but said she has no recollection of the problem and do not know what it is about and handed the phone to a gentleman called Solomon. He then informed me that our contract was approved but they had NO STOCK!!! Someone needs to speak to Yvonne as she is very poorly trained, has no manners, and does not keep her word to come back to customers. Why must we be treated this way?