For background: I work in retail for a chain and get paid pennies above the minimum wage.
Over the past few years I have been given and enjoyed taking in more responsibility within my role. However I still get paid the same as the 18yos sat on checkouts all day, whilst I am responsible for all cash office duties for the shop. If I book a weekend off it requires a manager to cover and when I do all I hear is arguments between the managers over why they don't want to/can't work that weekend. My job is generally one that would be covered by management in other stores. I don't believe it is unreasonable to ask for a pay rise, but given how the structure works I would be asking for management pay even if only for my weekend hours. I am becoming more reluctant to continue in a job I really do love because I feel so unappreciated and taken for granted.
How do I go about discussing this with my manager? I don't want to say pay me more or I'm not doing it any more, but basically that's how I feel at the moment.
Aibu?