Service Partner ONE Software Engineer interview questions

A very disappointing process overall. I was reached out to by both Managing Director Philipp and an internal staff member or a Software Engineering vacancy they had 'live'. After an intial pleasant call where I was told about the team and task ahead they provided me with a technical task to be completed. I spent 10 hours doing so - putting every effort I could into making sure it followed the direction they gave me as I was very interested by everything I had been told. The test was a success and I was invited to speak with their team which I cordially accepted - everything seemed very positive and I was assured I would be hearing back within 48 hours...I'm sad to say this was the last I ever heard from the SPO - This was 4 weeks ago and I have not heard back from their team despite emailing, phoning and contacting them through LinkedIn, I was told that team members were sick and that they would get right back to me. From receptionists to Product Owners right through to their MD Philipp I have been ignored in-spite of the time I took to complete tests and out of hours interviews. I would not hesitate in telling anyone that their recruitment procedure is a terrible waste of time and one certainly to be avoided.