You dont need better clubs you need a better game . As BMX pointed out its your short game thats the problem . You need to get that 16 ft. down to 11 or better and thats done by having a better short game . So you need to work on ball placement and shot selection .
Ball placement says it all knowing where to place your shots and how to attack the pin . On every hole there is an attack point for easier putts . Once you learn where that point is that should always be your attack point as much as possible .
Shot selection learn to use the flop pitch and especially the punch shot .These 3 are key for a good short game . All of your approach shots wont be a full wedge to the green and these 3 will bail you out as well as put you in there for easy putts once you learn how to use them
. The punch is a deadly shot to add to your game espicially with the wedges you have . Its a great go to for when you are in between clubs instead of trying to choke a full wedge when its easier to either choke or spin a punch . It will help you get closer to the pin every time for easier putts .
Play some practice rounds use the rock first until you get used to judging and hitting the punch then use your go to ball to dial in . Play all of the courses so you can see how it will be affected during play and what the results will be as well .
As far as upgrades go you still have aways to go before you can get the top clubs . What you can do is start doing the credit offers videos and surveys to build up a credit stash . The ball you are using is fine but you could step up to the L35 Cally at 300 credits for a better ball . You get a little less spin which with the Cleveland wedges can sometimes be just a little too much and thats with no spin applied .
But work on the first 2 before starting the last 2 . Good luck and hope this helps you with your game .