Bad service and lack of training to staff

I went to go apply for a laptop at Vodacom in Jabulani mall 3 weeks ago and I was assisted by a consultant by the name of Precious. She told me that they did not have stock and that they needed to order it and she would phone me back in a couple of days time to come collect it of which she never did. I heard from her after a week on Saturday and she told me that they had ordered a wrong laptop for me and that they would return it back and order the correct one. The following day on Sunday I got a call from Mabatho her colleague who told me to come fetch the laptop and told me to be there before 5 as they close then. When I got to the shop she told me they had given it to another customer and that I'll have to wait for them to order another one. I asked her why did she phone me to come to the store if they were going to give it to someone else and she said she is not the only one selling laptops and by the way Precious is the one who didn't do her work properly as they kept on asking her to phone me to come collect the laptop from Friday when they arrived but she was lazy to. I reported the incident to the manager and she sounded very unapologetic. I am very disappointed by this.