I have been using autotopup since the start but will be leaving London
soon :-) so I don't want it to do any more top ups in the mean time.
If I am running out of money I can put £5 on myself at a station.

I can't actually cancel auto topup without knowing, 24 hours in
advance, what journey I will be doing.

I normally cycle everywhere and only get the tube if I have been
drinking, if it's raining or in other limited circumstances hence I
can't specify a station more than a few hours in advance.

According to the helpline, it can't even be cancelled by staff in the
ticket office. So I am stuck. Any suggestions?

Chris