Walmart MasterCard question

I have an available credit of $1000/$2000

I made 4 seperate purchases

I made them all 6 monthly payment plans

I paid extra more than what was due

I have a negative balance of 450 so balance -450

But my available credit is still 1000/1000 because the rest of my payments aren't due yet

So I spent over 35 percent of available credit at 50% right now with a negative balance of 450

Will my credit get better or worse?

I'm considering cancelling one or two of the equal payments and just paying it out since I don't need the card to give me time I just use it for those juicy rewards points