North Georgia Animal Emergency Hospital overcharged blue ridge, Georgia

Our dog need to be stiched up after a bear swiped her. we went to north georgia animal emergency hospital in blue ridge ,ga. we took dog in an they took her to examine room an quoted 500.00 told them did not have that , the lady said we could apply for credit and if credit id not go thru we could work out payments. wife and i apply got approve for 700.00. went to pay bill after several hours of waiting ,guess what bill was for.. the exact same as our approved credit plus had to pay 30.00 xtra then... total bill  730.00. they did no more than what they told us they would do for the dog so how did they arrive at 230.00 more,,,than was quoted. we are thankful they saved our dog an would've paid more but it's just we feel like we were ripped off because i feel like if we were approve for a thousand then our bill would have been thousand.