Visa Inc. Software Developer interview questions

Worst HR team ever. I do not know what are they getting paid for when they are not able to accomplish their basic duties like updating candidates on follow ups and keeping track of interviews taken. I had given my final interview in April. Which was great. 2 Weeks later, instead of giving me the result of the interview, the HR said that she missed that I already had my final interview and by mistake she has scheduled another one for me. That made me really angry but I agreed on doing another interview. I interviewed for the second time in their foster city office a week later and it's been 3 weeks now and 4 follow ups. They are just shameless. They dont reply, they dont update the status on the portal they use. This all has taken over 4 months. They do not have the courtesy to inform candidates about their decision after the candidate has invested so much time.