Forced to pay credit life that i dont need

I contacted absa credit life and requested cancellation of OPTIONAL credit life on my personal loan and i was informed via email to cancel it at a branch which i did and it was confirmed that it will be effected within 48 hours. two weeks later i am still charged R395 for the optional policy that i have cancelled. i sent the email to ABSA to say i cancelled the policy and need the r395 to be reversed and all i am told is to cancel it at a branch WHICH I HAVE ALREADY DONE. i have contacted the policy complained people and there is NO RESPONSE from ABSA. the policy is OPTIONAL but cancelling it is not?