1. There's no such thing as "worked for a convenience store as part time department store supervisor" - you either worked for a department store(Walmart, The Bay, Winners, Target, etc) or a convenience store(Kwick Way and the likes).
You say it's a small store, so it's more plausible you worked for a convenience store. All the department stores above have websites and convenience stores don't usually.
2. Convenience stores often have just 1 or 2 employees working on a given day - I think CIC suspects that you may have "pumped up" your work experience to make it appear skilled.
Your employer should provide more information about the business - how many employees are there? How many did you supervise? What did you do to supervise?
This is your one chance to satisfy their concerns, so it's in your best interest to consult an immigration lawyer before you respond.
rimalal said:
I worked for a convenience store as part time department store supervisor for few months which is small place. It is a small convenience store and they dont have website for the company. They are asking more documents to fulfill their concern that store is small. What should I do.