I joined a hydraulic company in September 2013 as a warehouse operative earning 21/hour. In January 2015, our customer service lady went on maternity leave.I approached the manager and op supervisor and I said I will fill in the role of customer service while the lady was away.They gave me a verbal agreement that they would increase my pay to that of a customer service officer. I did the role for 3 months but never received the raise. When the lady came back, I went back out to the warehouse where I was told that the other warehouse operator received a pay rise up to 24.90/hour. I asked the senior management for a raise to the same level - they said no,that they couldn't afford it. Throughout the year, I had to keep on filling in the customer service role and I got the occasionally raise in wages but it was never close to what I thought I deserved. I asked senior management in head office about the raise but I never received a response. I left the company on July 4 2016. Is there any recourse I can take to claim what I think I deserve despite leaving the company?