RIP US OFF

we missed our flight from tashken Uzbekistan to Istanbul in august the agent charged us penalty and sold over price tickets and she was the most vicious person!! Not only that she booked our other ticket from istanbul back to US one month later , when we got to Istanbul we went to the customer service and explained everything the woman at the counter would repeat over and over that why we paid for new tickets , like it was our fault that we bought new tickets so after hours of waiting at the airport and not sleeping for more than 24hours with my three children another agent helped us to and changed our tickets but again they charged us another penalty which they told us hen you get home contact them and they will return your money we just have to do this for the system !! we wore charged over 4000 dollars to get back home which we already paid over 6000 for our original tickets and when I contacted the airline in return they said sorry and didn't return a penny of ours !! You guys have horrible customer service.