Hey stacey.sanders,
Thanks for the question. If I understand correctly, you just sold the iPhone. I would recommend that you read this article, it may be able to help the issue.
What to do before selling or giving away your iPhone, iPad, or iPod touch - Apple Support
If you didn't follow the steps above before selling or giving away your iOS device:
- Ask the new owner to erase all content and settings as described above.
- If you're using iCloud and Find My iPhone on the device, you can erase the device remotely and remove it from your account by signing in to icloud.com/find, selecting the device, and clicking Erase. When the device has been erased, click Remove from Account. After you erase the device, you'll need to wait 24 hours before you can activate iMessage on your new device.
- If you're unable to complete either of the above steps, you should change your Apple ID password. Changing your password won't remove any personal information that is cached on the device, but it will make sure that the new owner can't delete your information from iCloud.
- Deregister iMessage if you're switching to a non-Apple phone.
If you're using Apple Pay, you can also remove your credit or debit cards at iCloud.com. Just choose Settings to see which devices are using Apple Pay, then click your device and click Remove next to Apple Pay.
Thanks for using Apple Support Communities.
Have a good one,
Mario