change direct debit bank

hello.

I stopped using a bank account that has my direct debit at present and now it’s empty.

Please would you help me change bank details?

I have looked at other forum posts and there does not seem to be a “Mange my Direct Debit” button on the Billing page.

I also tried the “Change your billing method” but that is just email vs post.

Note that I do not have access to the app either as my present phone is not a smartphone.

cheers,

Alexander