Three interviews via Zoom. Addition "intelligence" test on line. The interviews were relatively straightforward but the company did not provide a clear explanation upfront about onboarding and training. Comp is LOW

I had a first telephone interview then a face to face with the line manager and 2 of his colleagues. We spent one hour together, they asked me a lot of questions. After one hour, the 2 colleagues had to go and I stayed with the line manager who asked me again new questions. He told me that a guy started but didn't stay because he had a better offer and that he had 4 candidates on hold but wasn't sure about them. He finished by saying that he liked my profile and he would like to make me an offer. I was really surprised but was very glad too. We discussed starting date, contract etc... and I told him that I was very positive but I wanted to think about it and have a chat with my husband. The day after I sent him an email to thank him again for his time and to tell him that I was really pleased by the offer but I would like to think about it over the weekend (we were on the Friday). 2 hours later, the line manager replied to me and told me that there was a change in the business and that now the role has been put on hold (whereas the day before he was telling me that he wanted to recruit 3 more people in his team). I tried to call him, voicemail... sent him an email... no response. I called his colleague who I had the first telephone interview with, and basically she told me that the line manager had doubt about me and my motivation because I asked him some time to think about it !! I spent a week chasing the line manager to have a chat to understand why the role has been put on hold, he always came back to me saying that he was swamped and finally never called me. I saw that one week later they have recruited someone. Very unprofessional !!!!! For an HR business, this is not an example to treat candidate