François Hi. The Joint membership was discontinued in early April and everyone was switched to the new membership model. Look here for more details about that switch: https://together.bunq.com/d/32580-why-am-i-switched-to-the-premium-subscription
Of course, Joint accounts are not affected. Only the membership model has changed, so you can still keep using your Joint accounts just as before. If you have any other specific question, feel free to ask.
If you want to contact bunq Support, you can find them through the "Profile" tab > ⚡️ > Support Center. https://together.bunq.com/d/32181-how-do-i-contact-support
