Collins Aerospace interview questions

Handed my CV in and then had a call with a developer. After the call was invited to an interview with a couple of developers. Interview went well and process was great up until this point. After interviewing, I didn't hear back from anyone until I enquired a couple of weeks later. Quickly after my email I was given an update and rejection. I followed up asking politely for some feedback, but didn't receive any feedback nor an update. I was pretty disappointed with this because as a fresh graduate I think it's important to grow and learn from failures such as this.

Call with the HR rep to discuss the role. Told I would be set up to interview with the hiring manager within the next week. Never heard back even after sending multiple e-mails and leaving a voicemail.