I am sorry to hear you are having issues with your mobile, are you able to call them? How is your number saved on their phone? Is it in the correct format? I recently could not call a friend due to it saving like a U.S number so 000-000-000 I was able to rectify this by going into my settings.
Just a quick post to confirm you're satisfied that the forum team have reached out to you? Remember, if you need help in the future, our fantastic community and forum team are always willing to lend a hand.