As stated in the title of this tread, i can't seem to find a way to add tp link ac2200 to my already existing wifi network on my modem. which is was promised by the salesman in the store. I've looked everywhere in the app and even in my modem but i can't seem to find it anywhere. Now i have 2 networks in my house and i only want one. All devices are on my modem's network and i dont want half of my devices on the tp link and half on my modem, i want them all on my modem and have wife throuhout the whole house.

Please help me with this matter, i'm no computer wizard.