can't use reportaproblem.apple.com

good day,

i'm trying to use I didn't authorize this purchase option in reportaproblem.apple.com site

it says We are unable to process your request at this time. Try again later. for 10 hours already.

the problem i'm trying to solve is the following:

"my 7 years old child made 2 purchases which i didn't authorize. 5790 rur and 7490 rur. it seems somehow he didn't need to enter apple id password... could you refund please? thank you in advance"