<script>
( function( $ ) {
    $( document ).ready( function() {
        var phone = $( '#et-info-phone a' );
        console.log( phone );
        if ( $( 'body' ).hasClass( 'page-id-8990' ) ) {
            phone.attr( 'href', 'tel:123456789' );
            phone.text( '123 456 789' )
        }
        if ( $( 'body' ).hasClass( 'page-id-9561' ) ) {
            phone.attr( 'href', 'tel:000111222' );
            phone.text( '000 111 222' )
        }
        if ( $( 'body' ).hasClass( 'page-id-9566' ) ) {
            phone.attr( 'href', 'tel:33344455' );
            phone.text( '333 444 555' )
        }
    } );
} )( jQuery );
</script>