Wireless stickup cam and Spotlight cam plus detecting nothing

Hi,Bought recently a set of stickup cam + 1 Spotlight cam plus for our home as we had some stuff stolen for our front yard.Now, no cam detect anything unless they look indoor...and even though they don't always detect someone moving...1 cam is screwed outside on the porch, other 3 are through windows. I can come and go around anycam, day or night, far or close, jump, wave arms, use a torch... nothing...Apart from 2 days ago when I had notifications every minutes as it was windy... but I have no idea what the cam saw.... yesterday, someone moved our bin on the kersbide to park his car (about 6-7m from cameras) and nothing..Right now feeling like an utterly wrong choice or design...I set up camera motion zone or not, put sensitivity and frequency to the max...nothing...SoAm i doing something wrong or are those garbage and get a refund ?