i've already admited it's my fault, what else can i do?

i don't want to dispute the fact that i've made a mistake but how long do you need to go before you have to do soemthng is what i'm asking, if he'd said the next day "sorry pal, you've bought it you pay for it" then fair enough, i'd try and work soemthing out with the guy, but if he's left it for 5 days now and still not a dicky bird what is a person to do?

if i start emailing him left right and centre then i could be seen to be harrasing him, but if i leave it lingering then he can say i didn't try hard enough to contact him