Old Mutual over charging services

I had a policy with them over a number of years, in 2022 I withdrew a portion - instead of them realigning the associated charges with the investments I had remaining in my account - they continued to charge me the highest value, ie. as if they were doing daily trades on my account.. when all that was left was investments that did not require any management. I withdrew the balance recently and my charges were over 20%!!! But now when you try to get in contact to have this reviewed there is a website form, an email address, and there's the direct contact number u call and select options... nothing has worked! I am so frustrated and annoyed right now! Especially given I was introduced by a personal friend - a pity as the "mates rates" are more expensive then if I went direct. I am stunned, sad, furious and disappointed in this service from old Mutual - and I will never invest with them again.