Qualcomm Firmware Engineer interview questions

I had applied through Qualcomm's job portal and then a team member reached out to me. After asking if I was still interested he got me in touch with an HR to schedule the initial interview. It was pretty quick. First round consisted of resume review and basic C questions such as bit manipulation and pointers.

After being informed about an upcoming salary offer, I received a call from another team leader (in the same group in Qualcomm) who requested that I meet with him for an additional interview. Confused by the sudden change, I decided to contact the hiring manager to inquire about the situation. To my surprise, the team leader who had initially contacted me reprimanded me for "circumventing authority." What was supposed to be a face-to-face interview turned into a bewildering and disheartening scolding session. Ultimately, despite being assured that it was merely a step to determine the specific team placement, I did not receive the promised job offer. Later when I tried to call again to the hiring manager (who promissed that anyway I'll recieve salary offer) - he ignored my calls