Send debt collectors after billing issue on their side.

After cancelling my service with them, they acknowledged that they recieved the cancelation, but only cancelled it in the next month. So while they were taking their time to cancel they still billed me. Now I am getting calls from a debt collector, even though I have proof that I cancelled the service before any billing was supposed to happen. They would have taken it from my card if I had not cancelled my virtual card that I initially signed up with. Be very carefull, they will just take your money, even if they cannot provide you with any service.