MTN-FALSE ADVERTISING /BAD SERVICE

I am very disappointed with the service we have received and the False advertising from MTN. My mum and I visited the store on 1 August as it was my birthday and she wanted to get me a phone as a gift. I read through the August catalogue and after speaking to the consultant I selected the Nokia 3.1. We where then told that the Chatsworth and Pavilion store did not have stock of the phone and we would be contacted within a week, exactly a week later we went back and spoke to a different consultant who then advised us that there was a waiting list and our names were not added so she added it. By this week Monday we still had not received any feedback so we requested a callback from the MTN call centre, the agent called my mum yesterday only to tell her that they don't know which store has stock of this phone. My mum then contacted MTN AGAIN today ,only to be told that none of the stores have stock.SO I would like to know what type of service is this??? Why advertise if you don't have stock? It is absolutely ridiculous and very upsetting as this was meant to be a birthday gift, but instead we received such a disappointment with MTN.I would really appreciate it if MTN could rectify this and assist me with getting this phone instead of being so unhelpful.