Acb cases

I am working as jr asst in commercial tax dept in ap in 2015 a trap case was registered against my superior officer acto due to demanding 10000Rs bribe for shop registration , in that situation i am also included as A2 as i worked as assistant toA1 in fir A1 name registered after trap the acb officials conclude as my both hands phenapthalin test gives positive as the amount pass on to A1 through my hands in 2017 govt issued orders prosecution permission to A1 i approch my dept prl secretary to explain my position about trap no bribe asked to complainant, no official favour is pending before, no bribe amount recovered from me and no more work is not related to me . The dept higher officials and hon'ble cm also not consider my representation to ordered me for dept enquiry. I am a middle class person and my service is only 3 years at the time of trap. Please suggest me how to approch myself to request the govt for dept enquiry presently the case was not started trails in hon'ble court . Thanking you sir , waiting for your valuable suggestions. Yours faithfully G.Rama Mohana Rao