Breach of contract?
 

We booked two MFR/VIE RT with United late last year. Confirmation email clearly states we will earn miles on all legs of trip and shows UA flight numbers for each leg. Dulles/Vienna leg given to partner Austrian Air. Mileage on partner Austrian Air on Dulles/Vienna leg not credited even though confirmation says award miles. Repeated appeals denied saying Austrian Air doesn't give Mileage Plus credit for our ticket class. What to do?

WASH/DULLES to VIENNA departing Tuesday, October 18

UNITED 6712 * Depart:
WASH/DULLES 5:25 PM
Arrive:
WED 19 OCT
VIENNA 8:30 AM
Seat(s): 34A,35A NONSTOP
Equip: 767
Award Miles**: ***** ECONOMY
In-Flight services: MOVIE
Meal: BREAKFAST

* OPERATED BY AUSTRIAN AIRLINES AS OS94
PLEASE CHECK-IN AT AUSTRIAN AIRLINES

VIENNA to WASH/DULLES departing Tuesday, November 8

UNITED 6711 * Depart:
VIENNA 10:25 AM
Arrive:
TUE 8 NOV
WASH/DULLES 2:35 PM
Seat(s): 23A,24A NONSTOP
Equip: 767
Award Miles**: ***** ECONOMY
In-Flight services: MOVIE
Meal: SNACK

* OPERATED BY AUSTRIAN AIRLINES AS OS93
PLEASE CHECK-IN AT AUSTRIAN AIRLINES