No Banking Details Received for Payment

March I opened a Cotton On account in Centurion branch.They informed me when it was approved by RCS that all necessary documents and details will be sent to me by email.Going on 2months later that account is now officially in arrears and I get numerous phone calls advising me of this.I had gone to the branch to request the banking details when I knew the first instalment was due and I had not received invoices or just banking details as I was told. I have no idea what to pay or where to pay it to? At this, the teller wrote out some banking details on the back of a slip! Ridiculously unprofessional!Where is my security that this is correct?Then I got a call from an RCS employee rudely telling me how my account is in arrears and treating me like I'm *****ing from them!I explained to her that I haven't received any details and if she could please arrange this to be sent to me I will in fact make the payment.2 Weeks passed before I received the next call from a second RCS employee to which I had to explain the same and another request was logged to send details.I called them today to again request bank info. The 3rd request to send it to me has been logged. Will I ever receive this???