RCS Issue to close account

Yesterday I settled my RCS account at the Rosebank Coricraft branch. After calling the RCS call center, I've been told to pay the settlement amount and email a letter of closure to [Email Removed] I've paid the settlement amount that I was given by the RCS call centre. After sending the email with my supporting documentation I've received a failed delivery email as the recipients mailbox was full. This is very concerning RCS. How else am I supposed to close my account if you don't cater for the size of the volumes of closures in your mailbox??? I have alternatively sent an email to [Email Removed] to have my account closed. I really hope you guys close my account without any issues as I've done everything on my part that needs to be done and after reading the complaints on Hello Peter I'm a bit concerned that closing this account is going to be an issue..