Help Deleting a Downloaded Master Calendar from Athletic Website off Samsung Galaxy S6


I work at a college and was trying to download the master athletic calendar to my Samsung Galaxy S6 so I would know when games and events were. Last time I tried this though I only had an Apple Ipod Touch, and it some how just created an app for me to click into to check the times of games. This time though when I downloaded it, it just linked in with my Calendar that is built into the phone. I have been using this calendar for my personal day to day but I DONT want the athletic schedule on it too! I am trying to figure out how to uninstall/deactivate/get rid of the master calendar all together. Since this is the master calendar it has every game and event our college has currently scheduled over the next couple years. I just assumed I could deleted it easily when I was done with it, which seems to not be the case!! I have only had this phone for 2 months, and know very, very little; as this is my first smart phone ever!