Unable to cancel an additional product that was sold

They sold a warranty booster policy to my husband telephonically, two weeks later and we still dont have any policy schedule to explain the benefits. I want to cancel this product as it is not as nice as it was explained telephonically. I get transferred from department to department to cancel, i was transferred to MSure but was told the policy will not reflect for about -3-4 weeks, by then it will be out of the cancellation period and we will be stuck with this product.