Who do I get support to my iPhone

It is difficult to understand what you are asking. If you want to update your iOS or check that you are using the most recent version available for your iPhone model, please read the following:

Updating your iOS

Go to Settings > General > Software Update. You will be notified if your iOS is up-to-date or if there is an update available. 

Before following the instructions to download and update, you need to make sure that: 

Your battery is charged to at least 50%;

Low Power mode is not switched on;

You have a fast and strong Wi-Fi connection. (Updating over cellular data or a cellular hotspot is not possible);

You are not connected through VPN;

There is no beta profile installed from a previous version of iOS;

You have at least 8GB of storage free; and that

Your iPhone is connected to a charger throughout the entire operation. 

Or you can Turn on automatic updates:

Go to Settings > General > Software Update.

Tap Automatic Updates, then turn on Download iOS Updates.

Turn on Install iOS Updates. Your device will automatically update to the latest version of iOS. 

You still need to ensure that all the requirements listed above are met. 

[Some updates might need to be installed manually]

Update iOS on iPhone – Apple Support (UK)

I recommend taking a free workshop to learn all about the new and exciting features of your purchase.

Click ▶︎ Skills: Getting Started with iPhone.

Click ▶︎ iPhone User Guide. 📖

This can be helpful -> iPhone User Guide –> eBook -> free -> https://books.apple.com/book/id6443146864