Reliance — validity over before expiry date

My validity over before my offer expiry date and its happen two times and cutomer care not pickuping my phone. And i am trying to contact from two month to cutomer care. On my no. Offer is for two month and validity over in 28 days. Make solution of my problem as soon as possible and plz dont do like this to the customers and plz pickup phones of cutomer otherwise dont give cutomercare no. Thnks