I suggest you write to them and ask them how come CSIS can issue a letter with dates and status under the same sections of the privacy act and you cannot?! dates and status are not top secret. The only thing you need from them is to confirm if they got the CSIS report and if they sent advice to IRCC or not yet. I think CBSA is just not used to the applicants sending atip requests to them before and now don't know what to do.CBSA ATIP division sent email saying they cannot provide information on security screening and cancelled my request for information.