Cancellation of automatic recharge from Guthaben

Dear Team,

I want to disable automatic recharge from Guthaben. My current tariff is O2 S pack but sometimes I need to recharge with M pack when all the data has been used from the current tariff so I don't want to have two packs activated at once because of the automatic recharge.

Please deactivate it. 

Thank you 

Regards,

Teena.