@saleago
While both EPMS (Ellis) and Jancyn are very legitimate companies, neither goes by the exact name you have quoted above. If that is how your contact/s named them, this is almost certainly a scam.
Use the links in the "Official List of Mystery Shopping Companies" linked below to find the real companies. Both are great.
Another bright red flag: Were you sent a check (a large one, perhaps), for work not yet performed? We you asked to use that money to purchase gift cards? Were you asked, for Ellis, to do anything besides visit apartments?
Hard work builds character and homework is good for your soul.