Debiting my account for service plan

I am still paying for a service plan that I cancelled, I was told by Liquid Capital that you paid them the full amount of the service plan. I don't understand that is done because I am cancelling it now as I no longer need it, yet you are still debiting my account for the service plan. Please stop debiting it and ask for your refund from Liquid Capital. They have cancelled it on their end and they want you to stop debiting my account as well on your end.