HelloBaby Camera | Add-on camera for HB50

I bought a HB50 model for my daughter when she found out she was pregnant. She wanted a second camera for it after the baby was born and I told her I would get it. I clicked add on camera only for the model the it said it was compatible with and the shipped me not only a camera but a monitor as well. The model number on the new one was the same that I had bought but totally different design so the camera would not work on the original one I bought. Then after emailing them come to find out they have more then one design for several models. If you advertise camera only then that’s what you should sell not charge for the whole monitor and camera if you only are ordering the camera and advertising camera only.