Useless technical support

I never know what to do when the customer support desk hasn’t understood what you’re asking them to do, but think they have. You try to explain, but it makes no difference. Do you ask for somebody else and risk annoying them? I just put the phone down having achieved absolutely nothing, after it became clear that anything I said was making no difference. It’s ridiculous because it’s only a configuration issue and should be something I could adminster from a web interface, but that doesn’t seem to be possible…Grump grump grump. Ignore me, I’m just cross that something which should have taken half an hour has so far taken three.