Poor signal to floodlight camera

Hi, looking for some advice about my flood light camera, set it up today and its working (sort of) im bit concerned about the signal of the camera, the little WiFi signal thing is very low and the live speed display thing jumps from around 25k to 4 up and down. Even with me setting the WiFi extender up on the windowsill outside not even 6 feet away it dosent improve. Live view disconnects quite often. Am I missing something here? Is it broken?