Unable to link account to CoinBase for withdrawal

I want to withdraw all my crypto- When I go to settings, the only option I'm given for choosing a payment method is credit card but I only have a Mastercard debit card. It's not giving me the option to link a bank account or PayPal. Has anyone else found this? I'm wondering how I'm meant to withdraw if I don't have a visa? Also, it seems odd that we're not able to contact a real person for support through the app, only bots that aren't able to help? There's no email or anything right?