Subscription Help

I have a subscription purchased through Dell for Office 365.  I can see it when I log into my Microsoft Account.  However when I click for details it sends me to Dell website.  When I log into my Dell Account it doesn't show up there nor any history of having purchased it.  I can't get a hold of a live chat or live person at Dell when i call any of the phone numbers I call.  The auto reply just keeps sending me back to the website and hangs up, even when I ask for a live person.  I want to cancel the subscription, but if I can't locate it anywhere on my account when I log in how do I find it?  When I talked to Microsoft Customer Service they said they could see that I had the subscription purchased through Dell, but said that I need to talk to Dell.  No Live chat on their website to help me with this issue.  Need a person, ask for a person and having absolutely NO luck.