Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
Hello,
Did you sign in with the exact Microsoft account that received the credit? If yes, the credit likely expired not when you signed in, or it was never applied to that account in the first place since credits are account specific and fixed to a strict expiry window. Check your Services and subscriptions page to confirm if the credit appeared there, then sign in here https://go.microsoft.com/fwlink/?linkid=2246882 and click Investigate charge so billing can verify the credit timing and status.