I use three sites for my bet prediction. I like two of them which are:
https://www.soccervista.com/https://www.zulubet.com/You can give both a try. But know that gamblers can still lose because no prediction site have 100% accuracy. Even I can say that they have not more than 60% accuracy.
Yeah just like you said there is no 100% percent sure prediction site, I have actually tried this prediction site when I was still starting gambling but i notice that there prediction sometimes could be 50% chances of wining while sometimes it could be 60% chance of also wining but however there games are not always sure of wining because there games are always many, they don't predict few games, so before all the games will play, three or six games will cut the slip.
So actually I don't really like prediction site but however if you most go for a gambling site is not actually advise able to play the games exactly the way they predicted it but however as an experience gamblers you could just pick few random games from there and change the betting method, you will see that you can be making some winings.