A 13th minute penalty followed by a fine hit six minutes later on the edge of the box by the forward earned the Rocks all three points.
Higgins was himself brought down in the area by Canvey left back Ashley Dumas after making a darting run towards goal, with visiting players surrounding the referee as they felt the decision was soft.
This not disturb Higgins who fired the ball home from the spot, sending his kick straight down the middle of the goal.
There was no debate about his second score in the 19th minute as after receiving the ball just outside the box, he cut back onto his left foot before sending a shot across Jimmy Guzman and into the corner of the net.
Canvey struggled throughout the game to keep possession and lacked the quality they have shown plenty of in recent months.
This lack of invention allowed the hosts to cruise to victory and boost their confidence despite still sitting in the dreaded drop zone ahead of Tuesday's match at home to Margate.