US has sent me three emails in the last year or so. the first gave me my miles account, the second told me about some news, and the third, about 9 months after the first one listing my miles, showed the miles at zero. i emailed from their site , twice, to complain, and 2 weeks after the first email, still no answer.

1. nowhere in the first emails from them did i see anything about miles being lost due to non-use.
2. no warning--i wish there had been something along the lines of "just 2 more months before your miles will be lost so do something now."
3. and now no answer from them.

anyone with positive experience how to get miles back?