My Rain account is still active after numerous cancellations

This is a follow-up to my last review of Rain, the response to which I was very happy with. As I had requested, Rain did refund my account as they had promised. The only problem I have now is that my account with them is still not closed, even after this, and the numerous cancellations I've tried to do. Even more concerning for me, is that my bank card details are still in their system and they've locked it in such a way that I can't remove it. I don't know if not closing customer's accounts even after cancellation is their normal modus operandi or if there's another reason. Whatever the case, my request please is that they allow me to cancel my bank card details as I'm very uncomfortable with keeping them there. Preferably, I'd rather just have the whole account deactivated once and for all.