Regarding overstayal from leave

Sir I am serving in crpf as assistant sub inspector (ministerial) since 2006. I have completed 10 years service in crpf. I applied for 15 days casual leave due to mothers serious illness and my dig sanctioned me 15 days cl on 28/05/2017 sunday on my application and cl register at his residence. I proceeded on cl with a xerox copy of my sanctioned leave application. But during my leave i sent application to my office to extend my leave. But dig did not sanctioned leave extention. I reported on duty on 28/07/2017. But on my reporting, dig told that he has not sanctioned me any leave and i was deserted. As i have produced xerox copy of sanctioned application with my joining report. Dig told how i made xerox copy of official document and how i proceeded on leave without proper leave order ? He told my supervisor and other officers not to permit me to enter into the office and to engage me in duties of gd personnel. He is going to initiate enquiry against me to award major punishment. What should i do ? My salary for the month of june and july 2017 has been withheld by my office. What should i do ?