Hi - I brought the Binatone Armour 5025s about a month ago. When I first connected the device it worked well, but in the last week or so I cannot make or receive calls. When I dial the number you just hear static noise and no connection. Would this be a fault in the landline or the phone? I have tried turning it off, re-connecting and have changed the batteries- but still no luck. The internet is also working fine. Any feedback would be very much appreciated. Thanks a million. Chris