No morals, values and work ethics exist in that company

Budget insurance company is refusing to cancel an insurance cover I had with them for a car that I don't own anymore. A debit order has just been deducted on my bank account for a car that has been sold. I have called them numerous times to cancel the cover to a point of demanding to speaking to the retentions department supervisor. I am being being intermediate by someone at that company and when I reported the matter to the supervisor she said that will be investigated and not only that she affirmed that the cover was cancelled and promised to send me proof of cancellation via my email and there has been no correspondence from my side received from budget since Monday when I spoke to her. She is a lie and very *********** and now I understand why her staff members are very arrogant and rude to clients.