Artomatix interview questions

I was contacted by the head of marketing to organise an interview for the following week, so I then emailed back that same week to check on their availability and to work out a time that worked for us both. I did not receive an email, so I followed up the next Monday morning. There was no response until Wednesday evening with the reasoning being that 'the week had gotten away from them'. They said that they would be able to call for the interview Thursday afternoon. Given the short notice I was not able to commit to this time as I had another interview. When I asked to move the interview to the next day I received no further communication. I have never experienced such an unprofessional interaction with a company, especially at a stage involving talent acquisition where professionalism is key to giving the right impression of the company to the candidate. I was proactive in working to secure a suitable interview date well in advance to ensure a seamless process, but these efforts were in vain.