Cell phone unlocking API integration

Hi, I need to integrate an API into a PHP page which I will then host on my own servers. Below is the documentation given by the site for the API. Basically, I want my customers to be able to submit their phone's IMEI number (15 digit serial number), their phone model, provider, email address, and country which will then be transferred to the company's unlocking calculator server. I will give the winner my individual API key, however, the documentation given by the api admin is attached which should be enough for a quote. This should not be difficult, only around a $30 job... Again, I only want a basic page with a form, and a confirmation page as well as confirmation emails sent to both me and the customer. Thanks!