Terrible service

I called in October to cancel my account with the company and I was informed that it was expiring on the same month. November they debited and I let it go, December they did that again and I decided to reverse the debit order. Now I've been getting messages that I owe them, when you call they never answer, consultants are always busy. It does not matter whether you call first thing in the morning or what. I've sent out emails with no luck.