You will have to reach out to the [Registrar's Office] (https://registrar.mcmaster.ca/about/) for this concern. They will be better able to help you. They can be contacted via live chat [here](https://registrar.mcmaster.ca/about/#tab-10)
Additional info:
Information about dropping and withdrawing courses: Withdrawing | Office of the Registrar | McMaster University
Information about dates and deadlines: Dates & Deadlines | Office of the Registrar | McMaster University
Information about refunds: Refunds | Office of the Registrar | McMaster University