Virtual Prepaid Card

Yesterday, I discovered that I was sent the email regarding the Virtual Prepaid Card on 09 December 2024, but it was categorized as spam. I followed the instructions and successfully activated it, and it is loaded with the 6-month bill amount equivalent. But, it seems to be valid through June 2025, so I am not sure whether the entire amount will be redeemed. Is there some way to extend the validity of the card?