OK so you deferred your course to September intake. Don't worry initially I applied for January intake and after 3 months when I phone called them they told me that your course is full for January intake and then I deferred it for may intake and got my offer letter for may intake after one week only. So don't worry you will get your offer letter for September intake and then you can apply for visa for September intakeMy apllication has been canceled . I called them, they said the course you had applied is full. So no LOA.
I asked them to change my application for Sep intake. They changed the status.
You also checked your seneca student center for update.