Highly dissapointed by service delivery

I have app**** for a mobile phone contract which was approved.However I have been waiting almost two months for the Huawei p8 lite that I have chosen.I was told that they were out of stock and that I will be contacted as soon as it arrives.Its been many days now that I haven't been contacted.Yesterday when I tried to lodge a complain telephonically at Telkom call centre,i was told very bluntly by the assistant that took the call that they at the call centre cant do anything so I ask her to direct me to the relevant person that I can lodge my complain to again I was told that theres nothing anyone can do.I informed the consultant that I am going to go public with this to which she said yes.How can a big company like Telkom advertise something which they don't have stock off???I enquired it other stores as well they also seem to not have stock.