FolderMount app still mounting folders after uninstallation

I am using Micromax A106 Unite 2. I used the app FolderMount to move files to the SD card for WhatsApp, UC Dowloads, Picsart, and other apps. After some days, my phone had many hang problems. I just uninstalled FolderMount and did a hard reset on my phone. But before uninstalling FolderMount, I forgot to unmount all folders. Now I am facing many problems with that. The FolderMount's partitions are still on my phone. If I create a folder "WhatsApp" on my SD card and internal storage, the folders mount automatically. And after 1 or 2 minutes, the phone will hang. I formatted the SD card but it is not a solution. I tried another SD card, but the result is the same. How do I remove these FolderMount's partitions?