Error on Submission – Form won’t work

Please help!

I have tried everything with this, tried to run it on a blank page, it is still unformatted now. : https://www.fasterplastics.co.uk/contact-us/

Whenever I submit the form, i am redirected to a blank page with a “0” top right.
I am redirected to : https://www.fasterplastics.co.uk/wp-admin/admin-ajax.php?_panelsnonce=49cad425a6

Thank you so much in advance.

John.