I have 10.70 eurosapp store credit but want to buy the 10 eurospacket in fortnite (online game) that costs 11 euro on mobile devices but how can I avoid this 1 euro?

I have 10.70 eurosapp store credit but want to buy the 10 eurospacket in fortnite (online game) that costs 11 euro on mobile devices but how can I avoid this 1 euro?

That is not possible, but you do not want to hear that, you have deleted my other answer.

By the way, I want to buy bread for 2 euro from the bakery, but I only have 1.70 euro with me, how can I avoid these 30 cents?

These 1 euro are processing fees that are not available on the console, for example, and a friend has made it once but doesn't know how

Complain to Apple who get 30% off the price. That's why it's more expensive. You will not be able to avoid it.