Il want to reset my AppStore balance to 00 $

Hello! Thank you for using Apple Support Communities.

If you are trying to zero your balance and still have a valid credit or debit card, you may purchase an item from the App or iTunes Stores for more than your balance. The remainder will be billed to your credit card, leaving you with nothing in your account balance.

Alternatively, you could ask Apple to remove and keep the balance. Use this link Apple provides to take you directly to the people who will do this for you --> https://getsupport.apple.com/?caller=kbase&PGF=PGF63005&category_id=SC0998&symptom_id=20198

If you choose the second option, use the direct link I provided. It might save you some time over using the general support link to Official Apple Support because that will just eventually take you there anyway after a bit of hunting.

Alternatively give Apple a call:

Contact Apple for support and service - Apple Support

If you are asking about this because you are changing regions, take a look at this article:

Change your Apple ID country or region - Apple Support

Have a great day!