Beware of dotsure petsinsurance ****

Early in the month I took out petsinsurance from abovementioned company. I then realized that the cover they give is much less than other companies for the same price. I sent them an e-mail saying I want to cancel my policy, and that they should cancel the debitorder. They responded then no they want to speak to me. I said I didn't speak to anyone ad it was done online. So the same should apply. This morning I get a notification that a debitorder didn't go through! Even though it would've gone through if I decided to keep it on the 28th! Lets ***** right dotsure?? Please people beware of these ****mers. I want that policy to be cancelled the same way I app**** for it.