I want to appear in December 2020 instead of September 17th, is that possible or would I face any problem as my admission validity ended in June 2020?

My admission in ignou MCOM was valid till June 2020. I had filled the June 2020 TEE, which would have been my last attempt if taken place. But now due to COVID 19 situation the exam got postponed to September 2020 with an option that if any student could not appear in this September 17th 2020 exam, they would be permitted to appear in the December 2020 TEE. I want to appear in December 2020 instead of this September 17th, is that possible. Or would I face any problem as my admission validity ended in June 2020?

Please someone help me soon. I have been trying to reach any authority for this query for the last 2 days, but all my trials are in vain as no one is picking up any call or replying to my emails. please help.