Honestly, with only 3 weeks of meds left, if they can't sort you out in the morning, then I wouldn't screw around with the local office anymore. I'd phone PALS or the PCTs main office or wherever, explain your situation, and ask them to find you an appointment with a local GP as soon as. And after they've had to take the time out of their day to explain things to the local office, I imagine that the local office you end up dealing with will be a little more accommodating.
I'm normally a pretty laid back person, and I understand bureaucracies and hierarchies and all that good stuff, and have no problems following the rules. But when it's, in a pretty real sense, your life on the line, it's time to start kicking ars*.