Conran & Company interview questions

I applied online after seeing a job advertisement through Dezeen, I was contacted 2 days later & interviewed the following week. The interview went for over an hour, and was relatively positive - the people that interviewed me were very approachable and professional. The only thing I found a bit rude was them questioning how I was apparently earning a lot of money for someone of my years of experience, which I disagreed knowing what my peers in my current company and other companies earn. I think this would have gone to show the average salary offerings they would have if I had actually been given an offer. I followed up 3 times - emailed, called, and follow up email and no response. For a company with this reputation I found this very disappointing and unprofessional.