Yeah I don't know how to ask either, more than maybe go on twitter @ing the pool or whatever.
I think it's more than reasonable to keep a space where grave mistakes such as this one can be worked out between the parties involved, instead of simply going "Nope, rules are rules. Overpaying 4000x is on you."
You don't have to engage with them. They're just miners.
I meant that I as in being a miner, wouldn't want to associate myself with and use a pool who wont correct obvious mistakes.