Finish a Game (Connect Photon with external server for multiplayer video game, and fix some bugs)

Hello, We have a video game project, Similar to the concept of clash royale, Its multiplayer works with photon and we want to connect it to a server that we have acquired, In addition to that we want to correct some errors that the characters, UI, missing elements and connect the store and their respective products

-Unity 3D
-Photon
-Firebase
-Android / iOS
-AWS
- C #