Stuck in Airplane Mode

Hi there, my Lumia 620 is stuck in airplane mode. So far I have done a factory reset (cogs going around) and downloaded the Windows software recovery tool for windows phone and ran that through my PC (twice) but when it finally gets back to where the phone should be in use the airplane icon is still on top and if I go to settings to try to turn it off, it just springs straight back on. Any knowledge on this problem would be greatly appreciated as the phone is totally unusable.

Thanks and regards..DaveTreg