Poor Service Incredible Connections Fourways

I visited the store in Fourways and after being assisted by Sydwell I had asked for HP Ryzen 7, after making payment for the item and reaching home I realized that they had given me the Ryzen 5. The store was in Fourways and I am based in Northgate and had to travel back to the store to get the laptop that I wanted. When I got there Sydwell wasn't very concerned about it and after speaking to the supervisor Previous she explained that she had to speak to the Sales manager. The sales manager Innocent wasn't very helpful at all. He made Sydwell say sorry which was okay but they didn't do anything for the inconvenience caused. When I brought it up the manager Innocent asked me what he can do to make it up, when I suggested something he said no he can't do anything. When I asked him what was the point of him asking me what he can do when he couldn't do anything he just looked at me. He had a very arrogant look on his face and wasn't helpful at all. I will definitely like to lay a formal complaint against the store, the Sales manager and the Sales representative because of the service and the inconvenience they caused me and the fact they were not coming up with any solutions to make up for it besides keep saying sorry. I have worked in retail before and that's not the way you treat customers. The manager didn't want to take responsibility for error made by their employee and kept saying mistakes happen.