Calling Discovery Bank!!??

Had Discovery Credit Card for many years and was very happy with the service but not going to be forced to belong to a bank whose principles I don't agree with. However trying to cancel with this Bank is very difficult as there appears to be only one email address whose inbox is full!!?? I ex-country in a remote area for quite a while and can't phone. I hate doing business by phone anyway as there is no record - can you imagine a bank without email addresses?? And also quite strange that in my quest to cancel this unrequested account I hope to make contact with the Bank via Hello Peter as I can't do so through it's own structures .... Anybody from Discovery reading this, my name is ED Beesley - please cancel my business with you ASAP