Epic Software Developer interview questions

Phone interview and online IQ test were straight forward. Skills test was challenging as I did not have data structures or algorithms course yet.

After I applied this company through CareerBuild.com, I got an email after several days just one day before Christmas. An HR staff ask me to move forward, and choose some time slot in next five days. I gave him the time slot I prefer to have phone interview right after I got the email. I didn't receive any confirmation till the schedule time. However, I still decide to wait for the phone interview at that time. Then after one hour, I received an email from another HR, he told me the HR contacted me before is on vacation this week, and he would like to schedule another phone interview for me in next Friday, and gave me the time slot to choose. I decide not to move forward. I have interview several other companies with different scale, but never had this situation before. This company is not professional at all.