Solutions 4 Mobility IOS Developer interview questions

I applied through online for iOS Developer post. I got email for Skype interview confirmation after 5 days. They have scheduled the interview and then I had attended it. Felt nothing special they tried to understand about me and my skills like so.. After the Skype interview they said I have a task to complete within 2 days. I agreed and prepared the project with key features which they mentioned. On the day of submission I asked through email whether they need the task project by zipped folder or UDID build. Since then I haven't received any email or reply from them. Suddenly I got email that they have selected another candidate sorry.. Then my question is why they made me to do 2 full day project and why don't they reply to my email inform early.... I would say its inhuman attitude and they are like animals in nature may be..