Quartech interview questions

Basic questions about my experience and previous work. Asked about related work and what I am most comfortable doing. Described Quartech as a company. Finally I had a live technical portion where I could use any language to solve a relatively simple problem. There was little pressure to know everything off my head and it was more focused on me describing my thought process.

Started with a Zoom call with HR. It went well so I got the second one which was technical. After that, they sent me an assignment. I finished it and sent it back in time. It starts here! I waited and waited for an answer. I emailed HR 10 times, she told me they are busy!! After a while, she replied to me that they are progressing to an offer with me !! I waited and waited and... Till now there is no response. It was the worst interview experience ever!! They just want to waste your time and humiliate you! that's it!!