Arrived at CT airport booked via Discovery paid for the express

Arrived at CT airport booked via Discovery paid for the express. It took so long my wife said 3 customers walked in & out before i did. It got worse I was given keys to an i10 & told to collect at C16, there was a Kia C16, the lady who served us came . We found it in C3. We opened the boot the hatch cover was broken we showed her she got another i10 which also had a broken cover in the boot she fetched a 3rd car key & it was damaged 1 side, after carrying 2 suitcases around the carpark my wife and I were not happy. I did ask the lady do we need new documents she said no she would change it. No inspection was done on the replacement. The inspection report i was sent is for the first car & not the car I am driving, also has different mileage. Horrible start to a holiday. Please contact me to confirm what to do.