To change or edit your debt account (where payments are sent):
First, open your Qoins app. Click on the upcoming payment from the UpcomingPayments card on the app, then tap the three-dot menu in the top right-hand corner. From there you will be able to select the option to “Change payment destination” and then change the information of the current account, or add a new debt account.
Once this is done, your payments will go to the new debt account you've added. This will not affect any already sent payments.
You can view the tutorial video that shows the process here.