I moved from Russia to USA and can't change an account or even delete it to create the new one.

The country associated with your adobe id must match the store you purchase from and must match the payment address. otherwise, change what's necessary:

change your country on adobe.com, https://www.adobe.com/international/selector/

change country associated with adobe id - https://helpx.adobe.com/x-productkb/policy-pricing/change-country-associated-with-adobe-id.html

change credit card and/or billing address, https://helpx.adobe.com/manage-account/using/update-billing-information.html

change currency - https://forums.adobe.com/thread/1999694

change store - http://www.adobe.com/store_selector/storeselector.html

change adobe.com website language - https://forums.adobe.com/thread/1999693

change age - https://helpx.adobe.com/nz/creative-cloud/kb/you-eligible-cc.html

<moved from download&install>