GMT matte black face switched by Rolex?

[rustym38a1]

The Stem pulled out of my 80's GMT "pepsi" with an original matte black face. I took it to my certified Rolex jeweler and they sent it off to Rolex in New York. About two weeks ago I got a call from my jeweler saying the watch was repaired and the good news was, it was at No Cost! That was a surprise. Last week they called again and said they just got it back and I could pick it up. I went to get it today only to find it was at No Cost but my matte black face was now replaced with the new style Gloss black face with the outlined indexes. I told them this was not my watch face and they said they would contact Rolex on Monday and find out what happened. I know my watch was the 16750 with the matte black face and no outlined indexes. The repair papers didn't mention anything other than the stem was repaired. Has anyone else had this kind of experience with Rolex? I thought if they were going to change or replace something it would first have to be authorized.