Namola gives the wrong coordinates

Shorlty after I received my latest Namola panic device, i complained that it didn't charge properly and almost never shows my correct position when I have tested. It usually gives a position I was at 24 or even 48 hours earlier. The call centre keeps escalating to the service department but I very rarely get a response. Yesterday I was assured somebody would contact me. Still nobody has phoned. In an emergency they will not know how to reach me in a situation where I am unable to verbally tell them where I am. I need them to supply me with a new device first and then arrange to collect the faulty one. But that doesn't seem to be happening.