Hi @aadilchadda
Here's a teardown [https://www.youtube.com/watch?v=GNdZNQ8L99M|video] that may help.
Not exactly a specific battery replacement guide but it shows how to open the phone so that the battery can be removed.
The battery is seen being removed starting at 3:24 minutes into the video.
Search online for [https://www.google.com/search?client=firefox-b-d&q=EB-BM207ABY+|EB-BM207ABY] to find battery suppliers that suit you best. (examples only)