Refund Delay

Hi there. Both federal & UT State files accepted. I`ve been waiting for months. I can`t even track my refund (It`s says it might be an incorrect information and I`m sure it´s not. It also says the estimated refund date is 03/07/19 .. I´ve been searching a lot and nobody can help me. Please someone give me a hand.

Thank you very much. I´ll appreciate your help.