Hi muhammad ade,
Thank you for your purchase.

You can add this code to hide Delete button :

.DTTT_button_delete {
    display: none !important;
}

and this code to hide to hide New button :

.DTTT_button_new {
    display: none !important;
}

In wpdatatables settings page in Custom CSS field if you want to hide the delete and new button on of your tables .

If you want to hide this buttons on some of the pages you can add this CSS directly on the page between <style></style> tags.

Best regards.