140 was received for sure. 回複：call or infopass your I140 to see

I know I-140 material was received for sure. And it is in the same envelop. But it seemed that 485 is no where to found. I cannot do infopass for 485 since I don't have any receipt. I want to send letters, fax and emails to USCIS TSC, in this way I can include my proof of mailing to them. I don't know who should I address to and where I can send it. Thanks.