Creatign a background service from unity3d to be working in ios/android

Hello, We built a game on unity but we are facing a problem where we hope to find help with, we want our game to be able to: 1- have a service always running even after rebooting the phone(ios/android) or quitting the game or launching a memory cleaner and ability to write custom code and functionality like requesting data from server and saving to local sql. 2- open a specific scene(activity) from the service. Example of usage: Player quit the game, run a memory cleaner app, and restarted the phone, the game should be able to keep asking the server frequently (each 10 minutes) if there is a message for this user, if yes, the game will launch a local notification for the player, when the player click on the notification, a specific scene from the game appears. Something like whatsapp when a user receive a message he get a notification and when click on it it go directly to the conversation page. Payment terms: 1- I will only release money if the project is delivered IN TIME and meet all above conditions. 2- I will not pay for non 100% completed project. 3- I will not accept half or pieces of the project, either the full project and IN TIME or nothing. Thanks and waiting...