You're being ripped off. That's far too much.
If you're talking about the 30 Baht scheme (or whatever it's called these days, Universal health Scheme?) it's only valid for the region the holder is registered as living in and, possibly - can't remember for sure - a named hospital, you can hardly blame Thaksin for your maid not keeping her details up to date. say what you like about Thaksin his 30 baht scheme was a genuine boon for Thailand.