Sticking (dragging) left front brake (9" drum)

Lately I noticed that the left front brake is sticking (dragging), even as I was pulling out of the driveway (feel as if the hand brake is not release properly although this is only on the front left). Steering pulls to the left too when driving.

To make matters worst, once on the move, the left front brake is almost not there. Even when I brake from 30mph, the car pulls violently to the right as if only the right front brake is working.

I have the standard 9" brakes all around with single master cylinder. The brakes were overhauled and working fine before. All shoes, return springs etc. are less than 6 months old.

Any advice? thanks.

Syed
Malaysia