Thijs Sorry to interrupt you again but this is what i got from viva,
“Hi, the Direct Debit service allows automatic transfer of funds to our Citibank bank account with your express consent. To pay by Direct Debit, you need to visit the bank where your bank account is opened and fill out a "Direct Debit Consent" document. A copy of the signed consent must be provided in our store or sent to our address : Sofia 1784, pk.44, to Vivacom, accompanied by a free text request describing your request.”
How do i do it?