How can Discovery allow pension income to be invested at a loss!

I have recently taken over my 85 year old fathers matters as he is become to old and sadly most companies take advantage of old people. I am shocked that his monthly annuity income is invested in shares at a loss for him. The financial adviser fees and Discovery admin fees is a lot more than what interest he is getting. The financial adviser has been dodging him for a long time, which is why I have had to step in. My father could not get help from Discovery or his financial adviser. Please look at the cost of an investment before you make the investment. You could be thinking you are fine because you are earning interest and then your cost is more than that. This investment is *****ing money from the only income an 85 year old has!