I have a cut off date of 05-Jan'22 for registration and my coarse doesn't have any option of online study. I might opt for a defer of intake if not received PPR before Dec'21 end. Hope for the best.I'm sure there might be a deadline for your course to register for classes as well as attend class, for me I've to be physically be present and attend classes by January 10th.
So I'm planning to wait till Jan first week or so and defer my course to the next intake.
You could contact your admission controller and tell them your problem and ask them if you can opt in for deferral. If yes, they will give you a new Offer letter for the next intake.
Last but not the least as we all know, is refund the amount.
There will be specific dates given in your college site ,take a look at that and keep in mind the date. Since it's reaaaally important when it comes to refund.