I forgot to post the code that I tried which was
function abc_acf_set_price( $field ) {
$type = get_field('pricing_type');
if ($type) {
$field['default_value'] = field_get('pricing_type');
return $field;
}
return $field;
}
add_filter('acf/load_field/name=pricing_details', 'abc_acf_set_price');