Does anybody know who this is?  It is an unknown caller with a number 4-203-002-5988 (this is what comes up on call display).  They are driving me crazy!!!!!

Caller claiming to be with Bell Canada with a special promotion.  Was in the process of telling him now wasn't a good time (that's as far as I got in my sentence) intending to ask them to try back another time and the prick hung up on me.

Tried calling the number back but can't.  I'm calling Bell Canada customer service.  It no way to treat customers - I hope they treat this seriously.