He divorced her via text message then he denied it or forgot
Question

                My husband and I had a huge argument and after arguing back and forth he issued a divorce in a text. He texted Wallah its over. You are divorced.' He says that he does not remember. We have been seperated for four months now although he has been trying to reconcile with me before my iddah was over. I have refused to get back with him until now. My question is, does a divorce in a text valid? If the husband denies it even though there is proof, is it a valid divorce? If I refused to get back with him before and my iddah is over now, am i haram for him and do we need a new aqd? We have four children and we want to reunite.
Praise be to Allah.
    Firstly: 

    Divorce by writing, if it is clearly stated such as saying 
    ‘You are divorced (anti taaliq)’ is a real divorce and there is no 
    need to have the intention of divorce. 

    See the answer to question no.
    72291 

    Secondly: 

    If the wife claims that her husband divorced her and he 
    denies it, then his words count unless she brings proof that the divorce has 
    taken place. This is from the point of view of rulings and verdicts, and the 
    matter rests with Allah, may He be exalted, Who can see what is in his 
    heart. If he knows that he issued a divorce, then he did not take her back 
    during the ‘iddah or do a new marriage contract after the ‘iddah, then his 
    intimacy with her is zina and is haraam. 

    If you kept his message in which he clearly stated a divorce, 
    this is sufficient to prove that divorce has taken place. If this was the 
    first or second divorce, then he may take you back so long as you were still 
    in ‘iddah. The ‘iddah of a woman who menstruates is three menstrual cycles; 
    for a woman who does not menstruate it is three months. The ‘iddah of a 
    pregnant woman lasts until she gives birth. 

    If the ‘iddah has ended and he has not taken you back, then 
    he is not permissible for you except with a new marriage contract that 
    fulfils the conditions of having two witnesses and a wali (woman’s 
    guardian). 

    And Allah knows best.