Poor Service

So I've been wanting to cancel my policy with Old Mutual from August and I've been sent from pillar to post. Old Mutual send me an indemnity form for ABSA to fill, ABSA instead wrote a letter stating that they do not have any interest in my policy as I have sold my property and further stated that there's no security code. I sent the letter to Old Mutual, now they want ABSA to fill in an indemnity form again. I have been to ABSA more than 10 times, they refuse to fill in the form because they have provided me with a letter. The consultant from ABSA called Old Mutual, and we spoke with a lady called Tanya who said the letter itself is fine. Now I'm stuck with the policy that I don't want, every month I am losing money and I'm not getting any help instead Old Mutual tells me about the indemnity form. What more do I need to do to get my policy canceled? I am sick and tired of Old Mutual consultants asking for something that ABSA wrote/provided.