Depending on what type of bike you bought, it might not be possible to raise the bars any higher than they currently are. At least not without purchasing more stuff. So telling us what you have or showing us a picture of it will get you more reasonable replies.

There isn't just one type of stem with the same configuration used on every bike.

And if it is a fairly new bike, you might want to have the shop you bought it from look at it. Otherwise you might be destroying something that otherwise will be covered by warranty. Though if you bought the bike at a big box discount store, then maybe just take the bike to a scrapyard and get another that actually fits you with the bars at the height you need.