I need to purchase data for my iPhone storage but iTunes don’t have any ways to do

It is not possible to buy more storage on an iPhone.

You can buy more iCloud storage. See instructions in Buy more iCloud storage - Apple Support

Note that it will only help with a shortage of storage on the phone in a limited way. See the information in About storage on your device and in iCloud - Apple Support

including the following:

Free up space on your device

You can make storage space available on your iPhone, iPad, or iPod touch when you use iCloud Photos and turn on Optimize Storage. Or you can remove content from your apps—like photos, music, and Podcasts—or delete the apps that you're not using.

You can buy more iCloud storage but you cannot buy more iPhone storage. Start here: https://support.apple.com/en-us/HT201318

You can not add storage space to an iPhone.

Renting iCloud storage space does not add storage space to an iPhone.