If you are naturally more of a bottom, then just state you are a bottom. I you put down you are versatile or bottom/versatile (or whatever we use nowadays) then you probably will be expected to act as a top somewhere along the way. Unless you have had an explicit conversation and you have made it known by only bottom. And in some cases, even if you list you are just a bottom someone might ask if you also top in some circumstances (like more $ or whatever). If you say "yes" then that is what is expected. However, I agree with you wholeheartedly that if something or nothing happens a discussion has to be engaged in. Hopefully an agreement can be come to as to the amount that the services that were rendered (assuming some were) were worth. In the end it is the client that holds the money.