customer satisfaction

Hi, I am a Dell Canada customer.  Bought a laptop online last Nov.   Long story short.  The first shipment was supposed to come last Dec but was lost in transit.  I went back and forth with Dell customer services many many times and couldn't get it resolved.  After 3 months, I sent a registered letter to Dell Canada CEO in Toronto.  I didn't get a response but I received my laptop one week after I sent my letter.  I have since been asking for a compensation for the loss of the 3-month use of my laptop and have been bounced back and forth between customer care and sales.  It seems like Dell really doesn't care about customer service.  Does anyone know which department I can talk to or that's Dell service that I have to accept?