Elderly mum direct debit from prime

mta999

go to amazon.com (rather than amazon.co.uk), sign in with your mum's usual sign in details (click forgotten password if necessary) and go to subscriptions page

Pollycat

Lots of questions the OP needs to answer if they want help from MSE members.

born_again

https://forums.moneysavingexpert.com/discussion/comment/82147336#Comment_82147336

Never known a "Prime" payment taken via DD, always based on card details CPA, as that is the payment method Amazon use.

pmduk

https://forums.moneysavingexpert.com/discussion/comment/82149360#Comment_82149360

In fairness, many people think that all such transactions are direct debits!