Cancel my insurance, I didn't agree to it.

Some agent called and said they can beat the price am currently on but they couldn't. Miway was more expensive than my current insurer. A day later I received a text confirming that I have joined Miway, I've been trying to cancel it but I keep getting nightmares. I want you guys to cancel it. Even if I considered moving, after this experience I wonder if you don't use the same attitude towards claims. I already have insurance, why would I pay two companies for the same thing?