Tripadvisor Android Engineer Co-op interview questions

I applied online on their website and received an email after a week for a 1-hr skype interview. The interview consisted of questions on Android Development and a couple of questions on Coder Pad. I was selected for the next round and I have scheduled an interview for the next week but after a couple of days before the interview, I received an email that they have already filled the position and will not be proceeding with my application. Well' that's unfortunate.