Problems locating my device

I have serious problems with my Norton Mobile Security which I already reported to technical department on at least three occasions. The problems is that Norton Mobile Security can not locate my two different devices which are Apple phone 6 with currently most updated software. Even after several times after advising by Norton specialists I removed devices from Norton website and added them their again, and uninstalled Norton Mobile Security program from iPhones and installed them again location of devices still had been working for not more than 1-2 days and then stopped working again. I believe that a lot of users of IPhones who have Norton Mobile Security installed in their iPhones have similar problems which they are just not aware about because these users either have not been using "Locate" my phone feature of Norton or have been using "find my Phone' feature of Apple Application. My issue is still not resolved and I hopefully still waiting for resolution.