I do not work at Check n Go, however I did have an interview with them and I can tell you what I did. I found the job listing on Careerbuilder.com, however they have a website as well.
When I applied I submitted my resume, they emailed me a few days later with an assessment to take, and the scores were automatically forwarded to them. They told me if I passed the assessment, and I met the qualifications someone would be in contact with me. I was contacted by a District Manager 2 days later for a same day interview.
I would recommend just simply browsing the Check n Go website to see what careers they have opened, and go from there.