Hi IDM!!!

You refuse to pay something you shouldn't owe, something they should have no right to ask for.........I don't call that stubborn
But........working on someone may have made a mistake somewhere along the line, could you maybe chase up.........I don't know the pharmacy or the insurance company??...........to sort something out??
And even if they are a little more, then if there's a way to get them cheaper??

But if you are stubborn........you know I say that sometimes stubbornness can be a good (sometimes a very good!!) quality , and this may be a great case to use it on.........you've been prescribed those meds, a doctor says you should have them, you've got the right to be taking them.........so be stubborn, be as stubborn as you can!!
Chase up whoever you need to on being asked to pay, and stick to getting them cheaper if you need to pay, if you can get them cheaper.........and either way, take a little pride in your stubbornness!!

Alison