If your visa has been granted and you're not being provided with your immigration details or documents, this is a serious matter. You have the right to access your own visa and immigration information. I recommend submitting a request directly to the Department of Home Affairs through an ImmiAccount or by filing a FOI (Freedom of Information) request to obtain your visa grant details. If the agent involved is a registered MARA agent and has acted unethically, you may also lodge a formal complaint with the Office of the Migration Agents Registration Authority (OMARA). Please gather all communication and payment evidence you have with the agent, as it may assist in resolving the issue.