medical bill battle continues

I had to dig out all the medical bills today to "uncover" the difference that the clinic finance was asking me to fill.

There I realised two issues:
1. The hospital charged $1755 for the doc's fees but only paid the doc's clinic $1718
(the difference is GST and service charge - dun ask me why)

2. Instead of paying $1950 to the clinic as stated in MY bill, they only paid them $1718 so I've to cough up the difference of over $231 instead of $195 (if we take 1950-1755)
so strangely, I'm asked to pay the service charges and twice for GST?

3. the finance lady took a while to re-look at the tax invoice churned out by the hospital to give me some funny numbers to add up to the pay out that they gave me which does not tally with what is paid out to me by the insurance.
(if the finance dept is the ONE issuing the tax invoice, wont they be able to "read" & understand it like the back of their hands since they handle these bills all day long? its their JOB isnt it?)

looks like the battle with the hospital and the clinic is going to continue... shall we bring the press into it as suggested? hmm...