I had my phone stollen and I can’t get the content of my old phone transferred to my new phone

You can only do that if you kept a backup, either on a computer of iCloud. Read this support article to discover how to restore your iPhone, iPad, or iPod touch from a backup --> Restore your iPhone, iPad, or iPod touch from a backup - Apple Support

You did make regular backups of your old phone on iCloud or a Mac/PC, correct?

You might lose a few days of information, but you can restore the backup to the new phone and the new phone will look just like the old phone.