Who called from 7634933309

Did not answer

"Hello.  My name is ____ calling from Windows Technical Dept.  <BLOCKED>  No way, answered and blocked.  When will these people give up???

When people stop answering their calls in any manner. As long as that happens, they're still in "business". No kind of answer means NO CHANCE at anything for them and they'll eventually tire of wasting time with unanswered numbers.