Ajax contact form widget plugin data not insert in database

Thanks for giving the table schema.

There are few problems in the code and table as well.

Issue 1

In the “vs_contact_form” function, there is a wrong parameter.
Change below line

$messsage = $_POST["messsage"];

To

$messsage = $_POST["message"];

Issue 2

In same function change below array. ( Array key should match the table column name )

array( 
    'name' => $name, 
    'email' => $email, 
    'mobileno' => $mobileno,
    'messsage' => $messsage 
)

To

array( 
    'name' => $name, 
    'email' => $email, 
    'mobileno' => $mobileno,
    'message' => $messsage 
)

Issue 3

It’s issue with table. Your table doesn’t have proper datatype length Please delete your table and create new table using following query

CREATE TABLE `wp_contactdetails` (
  `id` int(11) NOT NULL,
  `name` varchar(255) NOT NULL,
  `email` varchar(255) NOT NULL,
  `mobileno` varchar(255) NOT NULL,
  `message` varchar(255) NOT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;


ALTER TABLE `wp_contactdetails` ADD PRIMARY KEY (`id`);


ALTER TABLE `wp_contactdetails` MODIFY `id` int(11) NOT NULL AUTO_INCREMENT, AUTO_INCREMENT=2; COMMIT;