I'm sorry to hear that you're experiencing issues with the activation lock on your iPhone 7 Plus. If you've forgotten both the email, password, and phone number associated with the device, the best course of action is to try to recover or reset the necessary information.
Here are some steps you can try to resolve the activation lock issue:
1. Contact Apple Support: Reach out to Apple Support for assistance. They may be able to help verify your identity and assist in unlocking the device. You can visit the Apple Support website or call Apple directly for help.
2. Proof of Purchase: If you can provide proof of purchase for the device, such as a receipt or invoice, Apple may be able to help you unlock the device.
3. Factory Reset: If all else fails, you can try performing a factory reset on the device. Keep in mind that this will erase all data on the phone, so make sure to back up any important information if possible. To perform a factory reset, you can follow the instructions provided by Apple on their support page.
Remember that attempting to bypass the activation lock without proper authorization is not recommended and may violate Apple's terms of service. It's always best to go through the proper channels to resolve activation lock issues.