American Airlines Would not honor the ticket I paid for Dallas Texas

I purchased a round trip ticket between OKC and DFW.  I also had a reservation with britnish airways from DFW to Hyderabad India.  We had some bad storms in Okc the night before my departure.  Because of this a lot of flights were delayed or cancelled the day of our departure.  I tried calling AA twice but it was a 2 hour wait.

 I absolutely could not miss my flight to Hyderabad so I made a decision to drive to Dallas.  Because I was a “no show” my return flight has also been cancelled.  I called and was on the phone with American for over 3 hours but they would not honor my return flight because my ticket wasn’t valued at 200 or more.

 I paid for my seat both ways and I have read over all the rate rules for my ticket and see absolutely nothing about a no show cancellation policy.  I am furious!  The absolute worst customer service I have ever seen.  This is just a money scheme and they are purposely ripping off their customers.