~
Hello
according to your customer support we
can't delete or change our phone number in our account during 10years !!!

Is it true? What people can do if they change their phone number in real life and don't have access to the former one anymore?
That's not user/customer friendly at all...
Interesting. I didn't know about it. Now I see, indeed, you can't edit lines with your username, email and phone number. I think this should be changed, unless there is a really good reason for keeping it like it is, we don't know about.
The only reason for this would be that fortune jack do not want the account to change the hands and nobody would be able to sell or gift his account to anyone else. If anyone sell his fortune jack account, the buyer would never be able to change its phone number or email, thus this discourages account selling.
What else could be the motive behind it

They benefit when you violate.