Generative credit reset date not aligned with new promo code subscription

On Aug 23, I redeemed a new one-month code the same day expecting a fresh 4,000-credit cycle. Instead, credits are still tied to an old billing anchor date and won't reset for another week, meaning I'll only get ~3 reset cycles instead of 4 over this subscription month. Looking for clarification on why new codes don't reset the credit cycle, and whether this can be corrected.

So far 2 Adobe agents failed to help me every time login off. Seriously?