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When the ChatGPT Pro claim will not go through

Promo errors, fresh emails, App Store billing and a missing billing option.

It says “Promo Unavailable” or “Looks like you have an existing promotion already”.

Your OpenAI account already has a promotion running on it — a free trial, a student offer, an earlier discount. OpenAI will not stack a second offer on top of one. Check your ChatGPT billing settings; it may be one you have forgotten about.

The fix: claim on an email with no promotion on it — a fresh Gmail works — then sign Codex in with that account.

Do not cancel your current plan to make room. Cancelling does not clear the block, and you lose the subscription you were already building with.

Note that a paid plan on its own does not trip this error. The cause is an existing promotion, not the fact that you are paying.

I tried a fresh email and it still failed.

Then it is an OpenAI-side redemption failure, and GrowthX cannot clear it from this end.

Contact OpenAI support, then post in the Build Sprint channel so your case is tracked with the others. Keep building in the meantime — Codex runs fine on an existing Plus.

I bought my ChatGPT subscription through the App Store. Does that matter?

Yes. An app-store-billed subscription also blocks stacking, and its billing lives with Apple or Google rather than OpenAI.

Subscribe on the web rather than in the app, or open the redemption link in a mobile browser. Ask before you start creating new accounts.

There is no billing option in my account at all.

You are almost certainly signed into a work or team ChatGPT account, where billing is managed by the organisation. Switch to a personal account and claim there.

Patience—you’re about to be impressed.