You should always read the seller's return policy before placing your 1st order (this is especially true of non-RWG-listed sellers). This goes for non-watch goods, too. That way, there is 1 less surprise later on, or, if there is, you at least have something to point to when confronting the seller.
In this case, before posting here, you should have (& still should, if you have not done so already) email the seller for a clarification. Often, what the buyer thinks is a charge turns out not to be (either a mistake, misunderstanding, misreading or a tactic used by the seller to foil customs).