回複：what I need to do after I-824 get approved?

my I 824 was approved 3 month aggo, i wrote more than ten eamils to ua embassy in guangzhou, they keep telling me that they do not receive anything from the USCIS, and suggested me to directly contact USCIS. USCIS told me they sent the approval notice to the us embassy, and suggested me to directly contact embassy myself. it is like i am working in cycle???