Well first and foremost, I'd be going back to the salon that did it, as they've clearly cocked up.
You need to get some conditioning treatments on, to restore the moisture and elasticity. You mustn't even contemplate putting heat on it for a good while, as that's very likely to cause further breakage. The same for colouring again, you really need to avoid this for now, as it will only cause further damage on hair that's already weakened. I think you need to go with the curl for a while!