Ericsson Development Operations Engineer interview questions

First, there was an HR screening, followed by a technical interview, and then they provided the technical task. I had to create the cloud environment to complete the technical task, but they didn't provide me with any credits or a cloud environment - I just spent my money. After that, there was a session where I explained my solution. I worked really hard and solved their task with THREE different methods. In the end, they said something like, "We will come back to you soon!" but after that, they just DISAPPEARED and NEVER GAVE me any positive or negative answer! I tried to contact them from my side, but even after three weeks, they didn't reply, I am terribly disappointed that I wasted my time, and I find such neglect on the company's part outrageous and unacceptable!