ABSA International - Very poor service

A colleague and I have to pay our membership fees for an international organisation based in Switzerland. She paid with a few clicks from her FNB account. After nearly a dozen attempts, I am still struggling to make the payment from my Absa accounts (debit and credit). Phone calls to their international service are not answered and staff at the credit card division could not make sense of the problem. I am still to pay my membership. Very unhappy customer.