No response no communication

Cannot get hold of standard bank. I sent queries to prestige banking, my emails get quarantined, i sent to Mardi since she sent an emails reminding clients of Prestige banking benefits, no response Mardi Portgieter, not even a suggestion of an alternative contact. I send follow up email and copy complaints, I get a postmaster reply. the same email address that I used a few weeks ago complaining about my insurance Claim, today I get a postmaster reply.

How is such a large bank fail so much with communication.