HAk Air
Sorry o, HAK has nothing to do with either Harka nor Harco Air Services. Both Harka and Harco were operating in the early 90s whereby Harco was a breakaway from Harka. Owners were some northern big shots that couldn't get along with each other - the usual ego problem of who is bigger.
Obviously neither of them could stand the test of time and went out of business.
Hope this helps