Question for Jac-Den Enterprise Co Ltd

Good day I was an employees at kph I signed up to be a porta but they put me on buffin team where me an the Chemical dont get alone i keep on have to go the doctor an when i tell them the Supervision say nothing is work till one day I didn't feel well so I told the supervision an he say ok because it was my dayoff but true i work night shift my pay would be short so i came on the day off and he say i can go home then and the next day i reach work the clerk say shr cant sign me in because they put stop on my page is that right what they did????