Yves Vanderhaeghe’s men got the lead through David Rozehnal on the half-hour mark but were drawn level by Wesley in the 72nd minute.
With eight minutes before full-time, Akpala got in on the act as he netted the winner to condemn his former side to a loss.
The goal was the ex-Werder Bremen marksman's second in 16 league appearances for the Versluys Arena outfit.
And they are fourth with 37 points in the six-team Championship playoff log. In their next encounter, they face Anderlecht on May 21.