It seems Apple iTunes App Store having problem for users with iOS devices including iPhone, iPad and iPod touch.
Symptoms: User deletes purchased or free app from their own iPhone, iPad or iPod touch but after few minutes same apps reinstalls / reappear on home screen.
Assumption: I assume your iOS device is connected to the internet.
First things first: Backup your iOS device using iTunes on your Macintosh.
Solution 01: This solution will work 100% of the time.
Step 01: Let deleted app reinstall or reappear again.
Step 02: Now on your iOS device go to Settings > iTunes & App Store > Tap on your Apple ID > Select Sign Out
Step 03: After 1 minute sign in using same ID to ‘iTunes & App Store’
Step 04: Your problem should have been gone by now.
Solution 02: Read this post completely & follow solutions given as per your requirement… Here is how to fix if you are unable to update apps or install new apps from Apple AppStore on your iOS device including iPhone, iPad & iPod touch
Hope it solves your problem.
Thanks & Regards