I lost my levels because I, by a very big mistake factory-installed my cell phone.

Hi @BeWe and welcome to our adorable Community 😊 I am sorry this happened to you. Please follow the link below and you will see how to get your progress back.

https://community.king.com/en/candy-crush-friends-saga/discussion/177600/how-to-get-your-level-and-progress-back

I hope this will help you. Let me know if you need assistance. Have a wonderful day 🤗