I have a feeling that when they told you they would "look" at them, They meant they would test them and let the headphones run for a day or two to make sure everything is working properly. That is their normal practice. Usually one person is assigned for this task. If he/she is away, all repair work stopped. I also send my PS1000 in for them to check last year. They couldn't start for a couple of weeks because it was too cold in New York ( the wood would crack). I don't think they would just do a quick listen and send the phones back to you.
It will be fine. You will soon get your headphones back and they will be as good as new.