Warning! IHerb take payment for postage but have packages arrive with you that have not had shipping taxes paid and say that they can't help what our government charges nor what shipping company you choose (I choose?) £20 for two bottles of vitamins and they say, " Please note that the refund for returned orders may take up to 2 months to complete as shipping companies bring back packages to iHerb in bulk only six times a year. It is really better just to take care of the taxes than to have the package denied."
Forwarding this and all the other nonsense in their email to Which?