We have a team called the Help Squad working on exactly this. There is a series of screens rolling out now where you start by reporting a payment in the app as fraud and it takes you through the exact same process that anyone from customer support would (block card, identify what happened and how many transactions are affected, replace card, refund).
(This is why everyone should report fraud within the app if it occurs, rather than try to go directly to the phone or chat. In the vast majority of cases you will get your money back significantly quicker following the app!)