Trouble in cancelling my policy

I've called to ask for reduction on my car insurance premium and the consulted couldn't do anything. I then shopped around, then I got the better premium. I called requesting to cancellation of my policy, the call center send all agents in retention's department are busy they will call me back, no call received after 5 days, I logged a request to their hub site, the Agent called he asked me to send him my new schedule, i Emailed him he never called back. I sent another request again, after 3 days another agent called again, I told him the name of the guy who asked for my new schedule, then he said he will follow up and he also never came back.

All I'm requesting to IWYZE to for cancel my policy as I got the better deal with different Company.