Student or Learner
Hello Ms. X, my name is Y and I am an applicant to your xyz position. Yestarday when I was unavailable I received a call to my mobile phone, since I was unavailable my father answered the call. He said to me that "the call was from xy HR, and the lady on the phone told him that when I am available I can call them back from the same number". I tried to reach you by using the number that appeared on my phone, however I couldn't. Is it possible for you call me back?
Thank you very much dear 2006, it was an urgent e-mail so I sent the one that I posted on the forum, so I used my own English as you advised. Thank you again for your help.