to cheapoair,6 week waiting for refund since march 12,2016

I've been waiting for my refund for almost 6 weeks now.I keep calling the billing department everytime,but they can't help me getting my refund.my booking number is :33621829,contact no.6475190968,address:1-567 kingston road toronto ontario canada M4e 1r2,pls help me with this matter because they are not doing any action.