Im looking for a web developer to refine the site on WP.

Looking for a developer, not a studio or an intermediary. You need to refine the site on WP (correct the layout on several pages, set up the Mailchimp plug-in, set up Schema).

I usually pay through Western Union (hand cash) or PayPal. Other ways like Yandex, Kiwi and Webmani are not available in my country. Ready to discuss the payment method with the right candidate (if this method works in the U.S.).

Requires a specialist who is fluent in at least: CSS, HTML, JS, PHP

Necessarily - accessibility and efficiency (the main reason for parting with the current developer - the inability to reach even on urgent issues during the week).

Payment by agreement (hourly or project-based). Write your rates for an hour, please.