Bad service

I have had the most horrid experience, an arrangement was made for payment and kept. I received the rudest call. I ask for and email address or sms/WhatsApp number to be sent to me as I was not near a pen and this was not available. How can a collection department not be able to send confirmation for email SMS OR WHATSAPP number they want me to send proof of payment to but they can send a SMS to confirm amount to be paid which has been more than paid