
Hmm, you really need to ask the KC but I'd guess that you will have to pay the £70 again. The KC will be likely to ask why did you submit a word you didn't want to accept. Why not wait and see, maybe you'll get used to it.
Is it for an iminent litter, or just to add to your dogs names? I think I would wait a while, not use the affix straight away, and see if I got used to it. Then if I really didn't think I could live with it, I would apply for a new one in a few months time. :)
Dawn R.