We are all Apple users, like yourself, in the community ... we can not speak for Apple, or make any promises ...
Check your emails for an email from Apple: Seems there is a time limit on returning a trade-in:
Also:
You may have a confirmation number you received when you confirmed your trade-in quote.
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You might want to call 1-800-MY-APPLE if you are in U.S.A.
or
You may want to check with the staff where you picked up the new iPhone
or
See a list of Apple phone numbers around the world
Contact Apple for support and service - Apple Support
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Apple's trade-in info is available online : see below:
See the FAQ's at the bottom of the Trade-In webpage:"
Apple Trade In - Apple
Eg says:
- We’ll either send you a prepaid trade-in kit or email you drop-off instructions. If we send you a trade-in kit, it will include instructions on how to prepare and package your device.
- Your trade-in estimate is valid for 14 days after you receive your new device. It’s important that we receive your trade-in within this time frame to ensure that you get the estimated value.
- Your trade-in device needs to be sent to us within 14 days of when you receive your new device. The sooner we receive your trade-in, the sooner we can verify its condition and process your credit or gift card. It may take 3 to 5 business days for your credit to be processed.
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See: How to prepare your iPhone, Apple Watch, or Android for Trade In - Apple Support
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Trade-In status:
If your trade-in will be applied as a credit toward an online purchase:
you can track it from your Apple Store account.
If you’re trading in for an Apple Gift card:
(you need the confirmation number from accepting the quote)
you can track it at https://phobio.com/tradein/apple/status
All the best :-)