I have about £60 on my oyster (with an annual travelcard) and i wanted to reduce that figure a little bit. Soon-to-be expiring RTV's forced my hand with this one. I go to the farringdon and they say that they can't take some of it, only all of it. I call the oyster helpline and they confirm this. I return back to farringdon to withdraw all of it (with a view of adding some back on immediately after) and it refused (i didn't get a reason why) and i should try the helpline... again. The only other option was to cancel the card entirely, which was out of the question given my annual travelcard. Is there any reason why i can't withdraw it?