Comenity bank worst experience ever

I had a great relationship with Dell. I would finance a purchase and pay it off as fast as I could. 200.00 monthly payment from me was common. Then Comenity bank took over and my relationship with Dell went into the trash. I emidiately recieved a 400.00 finance charge and they haven't let up since. Fee after Fee after Fee. I have not received my "NEW ACCOUNT NUMBER" even though I asked for it repeatedly. At this stage it's best I just walk away and make a settlement. They ruined my credit they are not helpfull and they are an overall negative experience. Dell shame on you for doing this to me.