enable SOAP

I contacted my web hosting company asking about enabling SOAP, and was told that this is something they cannot help me with and I have to do it myself
through adding some script to my php.i&i file which I don't have any idea how to do that.
Any help from anyone here is highly appreciated especially after purchasing Hika business cart and my customer only uses FedEx for shipping so I need this
plug in.

Thanks in advance for any help

It's all explained there:
www.php.net/manual/en/soap.installation.php

To enable SOAP support, configure PHP with --enable-soap .

The method to add SOAP to your server will depend on your operating system as you can see in the comments of that page as each linux distribution handles that differently.
But it's not something you can turn on via the php.ini