How to remove travel ban after closing a case for an accident on work site

Good Morning Sir/Madam

My name is S. and I am working in safety. There was a fatality at my site and a worker died. I was in Al Rashidiya police station and was released after two days after my passport was kept in the station.

After two years, the police called us and informed us to collect the passport. The police prosecution didn't give any other documents but released our passport and said no more case.

But when I was about to cancel my visa, the office at FAIC said that there is still a case under my name and I can't travel.

Please advise, Sir.