How do I get a refund?

Past couple of years have been a real nightmare with dell.  in september 2011 I purchased an alienware laptop.  dell charged me for two.  a month after the first one came the second arived.  they credited my account when i told them i only ordered one.  they credited my account when the second laptop was refused and sent back.  they did not call me to tell me about the mix up and instead turned me over to collections (even though i had originally paid for both laptops - they took the money and gave it back).  I should have stayed away after that experience.  I got another laptop this christmas.  both laptops were purchased with 36 month subscription to mcafee (another mistake).  mcafee's latest update doesn't seem to play well with the alienware laptops and i don't have high speed internet to uninstall and download (mcafee only does internet installs - even from a cd) the "latest" version of the security software.  mcafee's tech support has been unable to resolve the issue(s) that have arisen.  when i asked about a refund i was told to get in touch with dell.  so...  how do i get a refund for the subscription time?  the new laptop has almost the full 36 months left and the 2011 laptop has like a year and a half left on it's subscription.  I want my money back so I can get security software that will work properly.