u/Hairy-Can8727

I’m 18 yearold and work at a family owned business. I got my recent pay cheque Sunday and I noticed it’s significantly lower than I expect. I know it’s wrong but I’m not exactly sure how many hours I worked, I complained to the manager and I asked for a copy of the schedule for those two weeks I worked and he won’t show me the schedule because “it doesn’t accurately display how many hours i worked” I feel stuck and don’t know what to do. What should my next steps to get this situation resolved.