SOAP API Help Status code 415

Hi, I am trying to create an API using the API connector. I have had success with Stripe and a Postcode lookup tool but I am struggling with this one.

Below is a sample request. I have seen a few posts on SOAP API but can’t see if this is possible to achieve. Can someone point me in the right direction?

When I try to initiate I get this “Status code 415
The server cannot service the request because the media type is unsupported.”

<?xml version="1.0" encoding="utf-8"?>

<soap:Envelope xmlns:soap=“http://schemas.xmlsoap.org/soap/envelope/” xmlns:xsi=“http://www.w3.org/2001/XMLSchema-instance” xmlns:xsd=“http://www.w3.org/2001/XMLSchema”>
soap:Header

company
username
password

</soap:Header>
soap:Body





25-35
X9 9LF


Mr
Matty
Catherham





1
CA
0
0



</soap:Body>
</soap:Envelope>