HBS Trash Service review: I want all debts cleared and taken of the credit bureau list

It started out Rocky Trash Company then HBS bought the company. They raised the cost. I called several times asking to talk to some kind of management, but their employees are rude. I never got the call back I was waiting for so I wrote them a letter still no response so I wrote another letter and asked them to come get their trash can and that I was canceling my service with them. Still no call back nothing they couldn't have cared less. 3 days ago, they came and got the trash can. I canceled my services 3 months prior. Now they are sending me a bill for hundreds of dollars. I will not pay a penny and I am sure they turned it in to the CB.