...they seem to think if they just keep on requesting the same thing over and over again they will get a different answer.
So this is just a matter of patience, of whom will ever give up first,... Its either you will put them on ignore or they'll stop requesting such things from you...
If this thing has been already an issue ages ago maybe you should now put them on ignore. Its just a waste of time for you...
I get paid to answer these posts as it is part of my job, they don't get anything out of it, so I guess I'll have greater patience.