As far as I know, people residing in the US can use a kind of virtual phone call technology to get through to a call center agent. Do you know your VO? If your case is processed within Canada, then the agent is able to provide you with some info.
However, you can only know RR or SS through your CBSA/GCMS notes. Call center agents wont let you know this information.
Chances are you are neither SS nor RR, as both are not common and only account for less than 30% of the total number of applications.