Camera not working

Hi everyone - I have a stick up security camera. Battery fine, light sensor working, wifi absolutely fine, camera well within range of router. However, the camera itself has never connected to my phone in live view, not once. Am I meant to sign up to some sort of service to get the camera to work - or is it a plain dud camera that needs to be returned to the shop? Appreciate any advice - a bit sick of trying to get it to work!