3 meeting one challenge first, talk with the hr after a challenge by the TL after chatting with the CTO Overall the process was good with a good vibe and professional

It was a total mess on the part of the HR. I sent my first apply in early February in which I got a reply asking to wait one more week to schedule an interview call. After that I don't receive anymore news about the interview. After a mounth and half I try apply again for the same position. Two days later i got a call from another person from HR and this time I got success scheduling an technical interview. The interview in my opinion went well. I was subsequently asked to solve a problem proposed by the company and explain waht was my decisions on my solution. One week later I got a new call from HR telling that they wanted to move forward with my application and that they would call me in 48 hours to get the details of a possible proposal. Also asked me for contacts from my old company to get more info about me. The problem is that no one call me back. In the following month I sent two emails but no one answered me. After that they contacted me saying that there was a problem with the position that I was applying and that in the next week they will contact me again to try get a solution from my issue. Also it was given a phone number to call if no one call me back. Once again no one call me back and this phone number doesn't work.