There is now no way to call OpenTable Customer Service anymore; you can only use their chat function, which has long queues and often disconnects on its own before resolving a problem. Remarkably, there is no way to change your email address to replace an old address without setting up a new account and merging the two accounts, which will cancel all your pending reservations and make your dining history inaccessible. This makes no sense at all. Clearly, they don't care at all about inconveniencing their customers. Tell your favorite restaurants to use a different reservation service!