Useless - call yourself anything, but not a bank or a dead porcupine

It is easier to reason with a dead porcupine than with these idiots. I tried an online purchase for airline tickets, but my limit was too low and the purchase was declined. I then set the limit higher to try again the next day, but two minutes later the purchase went through. You can't get through to the useless customer service of the airline, the agents promise to call back which they don't and when you speak to the bank (sorry, I actually meant a real bank!) they "need a letter from the merchant". How in blazes do I get a letter from the merchant if I've tried calling five times, each time holding on for more than 20 minutes!!! Absolutely useless!