Hi mralaoui,
Thank you for posting and welcome to the Community Forum!
I’m very sorry to hear about this.
In general when you wish to create a billing agreement with Facebook, you will need to add and verify a debit or credit card on your PayPal account. Once that step is completed and you have funds in your card balance you should have no problems with the payments to Facebook.
If you need any further assistance, I would recommend you calling PayPal Customer Services by clicking onto Contact us on any PayPal page as they will be able to help.
We also provide support via Social Media (24/7). You can contact us directly on Twitter @AskPayPal or on Facebook at https://www.facebook.com/PayPalUK.
Hope it helps.
Anna
... View more