Itzy Ritzy interview questions

I applied for a design job online after coming across it on LinkedIn. I received an email reply the very same day about how they were very interested in speaking with me about the design position. I replied back within an hour of the email reply but didn't heard back from them for at least 48 hours. I sent another email a few days later just to make sure my reply didn't get lost in internet land. I never heard back from this company. I find this very unprofessional and definitely not a place I would work for.