Since I was only given a mailing address to contact them, I sent the following letter to my mom, who in turn printed it and mailed it to Texas:
900 Grand Plaza Dr NHCCR
Houston, TX 77067-4323
Dear Customer Care Department,
Miles: 796 x .54/mile = $429.84
Clothing, daily necessities, misc.: $356.20
Airline ticket price difference: $1,111.30
Forwarding address in the US: 8332 Mix Avenue Magna, Utah 84044
Brazilian cell phone number: +55 (61) 99672-9498
Dear Ms. Child:
I was disappointed to learn of your recent experience in trying to fly with us from Pasco.
Our records show the tickets were issued by Expedia and were issued using TAM Airlines tickets, who is not a Star Alliance partner. At this time our records show that you were not at the game within the time frame to be included on the flight. Therefore I must decline your request for any reimbursement caused by such an incident.
Ms. Child, we thank you for your time and hope that you will consider us in the future for your travel needs.
Corporate Customer Care
I seriously laughted out loud at the last sentence in the email. I will NEVER consider flying again with United Airlines. I have been in contact with a representative at GetService.com and hopefully they will be able to help me with the next step.