Impossible to get money back. Poor service. Sick of robots.

Almost impossible to get through to an operator! Shocking service. I canceled my insurance in March and am still being billed for it. I phone every month to have it corrected and each month I get promised a refund and that the call will get escalated. Nothing happens and I keep getting billed. Also cannot escalate the call. They agree the fault is on their side and now owe me 8 months worth of payments and counting.