A woman with a slight Indian accent asked for me by name and said she was with Bell? Dell? and wanted to verify my business contact information.  When I asked what this was for and who she was with, she hung up on me.

calls with no message left,  just a long buzzing sound

Whoever calls me EVERY Friday.  Calls twice in a row, never leave a message.  Annoying.

Got this call again - possibly the same woman, but instead of hanging up she identified herself as being with Symantec.  She listed several of the various ecommerce and marketing products they offer, then tried to confirm my employment information (job title, responsibilities, etc) by asking whether those products would appeal to someone with my job title, "...which is what you do, correct? For the last X years?".  I just said "no thanks" and hung up.

They (he) call and ask for our HR director and when I asked if I could help them with something he breathed heavily like he was disgusted and hung up on me. I called them back and he wouldn't answer. I'm asking the company to block their calls.