Thank you for tonight's prank idea, I'm now googling his phone to see if it has autocorrect dictionary lmao

In the UK Revlon hasn't used hydrogen peroxide in over a decade so you should be good, when you're in the store look at the box for the same one you used to be safe. I'm not sure but I think Canada has similar laws to us around hydrogen peroxide so there shouldn't be any in them but don't bank on that just encase I'm wrong.

My hair was really "strong" against bleach and would be really soft if I used good conditioner/masks after too. Until one day it wasn't, I'd used bleach 4 times in 13 months (one or 2 double bleaching as something went wrong) and 2 turned green. Bald spots everywhere. It's back to normal now and I do my hair max once or twice a year to protect its condition/quality. As you're young and it sounds like you haven't had too many disasters yet your hair is still "strong" now but it'll turn like a flip of a switch if you do too much too quick.

Woah Woah Woah stop where you are before you go bald.

Take it from a 31 year old who has only ever dyed her own hair never seen a hair stylist (and I've done all the colours of the rainbow), this is fixable but we need to confirm some things.

What box colours are you using and do they have hydrogen piroxcide in them? If they do stop any colouring and enjoy the green for 2 weeks minimum, you've done too many colours too fast your hair will go brittle if it's not already and will fall out eventually. Just loads of washing with a good quality conditioner for coloured or damaged hair (like try washing your hair every other day, if you can afford it and get hold of them conditioner masks every day. What you can try to avoid extra damage from over washing is wetting your hair just so you could put the conditioner in and leaving the conditioner for 5-8 minutes before washing it out). If they dont you're fine to do this next step. If they do only do this step after 2 weeks minimum or enjoy bald spots.

Not being sure which country you're in I can't say a specific brand for you but you need to look for something like this hair colour remover, extra strength due to the amount of colour in your hair

You may have to do 2/3 due to the level of colour you've done but you may get away with just 1 if you're very very careful. Heat is very much your friend with colour b4 so if you get that one make sure to have a hair dryer/cling film at the ready but still do the full times it suggests (I have super thick hair so I normally leave it in an extra 30 minutes and then go over it with the hair dryer before washing it all out), any others read the instructions carefully. When washing it out it's really important to try a few different water temperatures at the end to make sure everything is gone. I've done it before where I thought it was the right temperature and the water was clear but actually it was too hot/cold and the colour came back so do a few different ones and don't stop until all the water runs clear.

After you have stripped all the colour from your hair and you're sure you are definitely down to your natural colour give it at least 48 hours to make sure you didn't miss anything and the colour doesn't come back making sure to conditioner it a lot in that 48 hours. After that the world is your oyster. However unless you have gone blonde and your hair has fully taken it properly NEVER put another colour on top of the colour in your hair. Always strip the colour first using hair colour remover and do not bleach a colour, that's how you end up green not the purple shampoo. I say that as I have never used purple shampoo or any of that side of products yet when bleaching my hair blonde to go red/blue/green etc well let's just say especially for the green I didn't need the box dye in the end and I had to delay my red and blue dyes to get rid of the green.