How to officially delete data for a game on iphone and start a new game?

Ok so here is my situation.
I downloaded that new ios marvel game Contest of Champions and I messed up on it and I really want to start over. But every time i go to gamecenter and delete data and achievements and stuff then i go back to game and it will say welcome back (my game center user name) and my stuff will be back, and all the data and stuff in gamecenter will also be back. I went to icloud in settings and like there were only a few games that were under documents and data and the rest weren t. Its like that specific game save will never go away on my iphone 6 its driving me crazy please help

Delete the game, it will ask if you want to keep your data, press no and re-download it.

You can delete and reinstall a game but it will not delete any online data such as stats, rank and so on associated with your account, only a new account would do that
if its just the save you need to delete then delete the game and it will delete the save when you say you do not want to keep the data

  • When will the iPhone 5 officially be out of stores? I want to buy the iPhone 5 before they take them out of stores. I don't like how the 5c is plastic and I want a black phone. Also I don't want to spend a lot on the 5s.
  • What language should I start with to start developing iOS apps? If I want to develop iPhone apps, should I learn Python first or just go straight to objective C or learn something else? I have 0 programming skills and have only done some web development. I have a Mac and Xcode.
  • Is my iPhone's battery officially screwed? Last night, I was charging my iPhone battery overnight. This morning, I woke up to it - it was still charging, but the screen was on that low battery screen. It's still on the low battery screen right now - even though it is still charging. Does that mean my iPhone's battery is officially screwed?
  • I'm going to start re selling thing, where should i start? Okay so i have items new (phone cases, chargers, clothes, etc. ) but i don't know where to exactly start instagram or twitter or ebay or amazon? I want to be local maybe but ill ship if i have too. & how much should i list items for? example would $8 be a good price for a new iphone 5/5s/5c charger that is 5 ft. everything would be new shirts price around $5 -$10? i want every thing to be at a reasonable price.