How can I make my fire colours more firey?!

I would give it a wash or two, and go over the ends/lengths with more yellow. I don't know which one you used, but IME warm yellows don't last as long as neon yellows, so try something like Pravana Neon Yellow or Directions Fluorescent Glow.
If you want a dye that doesn't run when rinsing, Pravana have recently brought out a 'locked in' range that doesn't run or bleed at all

For the yellow I suggest using this method to remove the orange.

Definitely dilute that orange. It's a highly pigmented dye and will bleed like crazy. Dilute it by at least 50% to stop bleeding, more so if you want a lighter orange. You can also add some of the yellow dye to it.

For my ombre I find it's best to use low-bleeding dyes like Adore otherwise it just winds up muddy after 2-3 washes.

Thank you! Spooki you were my inspiration to change my hair to fire ombre!! I have your pictures saved on my pc to swoon over haha.. would you suggest adore is the best? I'm not really sure which dyed are the least bleeding.. (I'm sure they'll be a thread I just haven't found one) xx

In my experience adore is one of the least bleedy dyes.

Although as wicked pixie has already mentioned, there is a new line of pravana dyes that aren't meant to bleed, so you could check them out if you don't mind spending more money.

Out of the more affordable dyes adore is definitely the least bleedy.

Thanks 🙂 I don't mind spending more, but going to try the adore first as it's easier for me to get my hands on. I've just ordered adore intense red and orange blaze. Also directions flo glow. Going to give my hair a really good wash and try and strip out some of the pigment (I used undiluted red so think I just have so much red pigment floating around).. try and make the ends lighter and see where I am from there!

The work we do for our hair eh?! xx

I was about to give up on the ombre until I switched to Adore. Using Manic Panic for it gave me such a headache. I wound up loosing a little length because I beat up my ends too much trying to keep them yellow.

I typically dilute my Adore colors a bit, mostly to make them last longer, but I can use them full strength with out bleeding issues. Adore also blends beautifully with no effort. I literally just smack dye on my head and it comes out blended perfectly. For contrast, ombre with Manic Panic and ombre with primarily Adore dyes (yellow is still MP, some punky color was used as well).