From great to bad

I left a message on Hello Peter for the exceptional service I received from Miway and how upset I was to leave them due to relocating and thanked them for their service and requested to cancel my account. Nothing happened my account is still active they have made me pay for the month of May. I cannot take calls due to being in Germany. Really bad way to end such a great relationship. I want my money back for the insurance on the car for the month of May. I am contactable via email and would appreciate some help with this