Verizon never canceled my service.. I'm still getting charged.

I disconnected with them. Have been the phone back and all. Now they sent me a bill for $133, icludinf a $75 suspension fee. I'm not paying that shit. Why did they send me a bill, I cancelled services, I paid the return fee, the stocking fee and all, so why send me a bill??? 
I'm not paying this 
Sooo... the girl never cancelled my service and it's been ongoing charges.