The company is asking the contract holder to settle the bill
Question

                A person has used my name, by my permission, to open a mobile phone contract for himself. This person does not pay the installments he should pay to the company, although he did not use this line. Is this haram? Am I responsible for this?.
Praise be to Allah.
    Custom dictates that the person whose name is written on the 
    contract papers is the contract holder, and if that is the case then you are 
    the contract holdr and you must fulfil the contract, because Allaah has 
    enjoined fulfilment of contracts. He says (interpretation of the meaning):

    “O you who believe! Fulfil (your) obligations”

    [al-Maa'idah 5:1]. 

    So you have to pay off to this company with which you made a 
    contract the money that becomes due as the result of this contract. It is 
    not permissible for you to try to evade that. 

    Then if you allowed this person to benefit from it on the 
    basis that he would pay the instalments, you can ask him for these 
    instalments yourself. 

    And Allaah knows best.