How do I change my phone number in login settings? Unfortunately I lost the number and would like to change it to my new number.

The problem, however, is that "2-step authentication" appears to be enabled on the lost phone number, which is the old one I lost! 

In addition, I don't remember ever activating "2-step authentication" so I don't remember the “backup codes” either.
or that I received an email, etc. to confirm it.

I can't even make a purchase. 

The whole thing is so disturbing and annoying.

that I can't even make "Razer Gold" or various purchases. Other activities are also blocked.

Could anyone help me, please.
I don't want my previous purchases to be a waste.

!!  🙏🏼  please help me, please  🙏🏼  !!

With friendly greetings

Riemchen81_GER