It's frustrating when this happens and most missing miles claims are resolved faster, but you are still within the up to 8-week resolution timeline they gave you on 3/11. If you don't get a response or posting within that window, I'd email them on May 7 citing the fact that 8 weeks have passed with no posting of the missing points or response. We can question why they need so much time to follow-up on missing points claims, but what good does it do? They're quick to resolve most claims based on my experience and posts on this thread

I had a missing Macy's order from December when the merchant was at 15x and I had a similar scenario to yours. It took two follow-up emails after their deadlines slipped, but they came through. After my first follow-up email they sent a response indicating something to the effect that they were escalating the matter with the merchant, which I found satisfactory

You're wasting your time contacting American. They can't do anything about this except listen to you vent.

If Cartera blows their 8-week timeframe and doesn't respond to your follow-up email with a reasonable response and timeline, you could consider filing a Better Business Bureau complaint. I did this once with Cartera in a situation where they completely dropped the ball a couple years ago and they reopened my case and posted the miles., but I don't think we should abuse that option. You don't get your miles if Cartera doesn't get their money from the merchant and it seems like some merchants take more time to follow-up on commission claims with Cartera, and that wait gets passed on to consumers.

If you need a certain amount of LPs by a certain time to get status, Cartera isn't a sure bet.