After you file

hello can anyone help me please? i filled form 3911 after six  weeks the representative told me IRS never received the form that i faxed. Every representative will tell me different IRS center. I live in NY state can anybody tell me what to do ive  been waiting for 2 months now, im just so confused on what to do. first they told me fresno CA. Then now Missouri. Then just yesterday they want me to mail it to PA. It seems like they are giving me a hard time with the refund.