Dhru fusion api integration on my website

I want to integrate an api (automatic process integration ) on my retailer site. My reseller using Dhru fusion Gsm portal he provide me my api key. But i want to develop a whole system which can process order automatically through api key & order can be delivered to my customer a copy of that order reach to my e-mail. Other documents related to this which my reseller send to me is attached. Those who done it before prefer first. More information: I have an unlock code website through which i sell mobile unlock codes. Now i am doing this manually, first customer buy it from me then i go to my reseller website & generate the customer requested code & then send it manually. I want this whole process can be done automatically through api key. Hope you can understand my work & will help me