No response from Standard Bank

I requested bank statements per email from January 2020 up to present. On March 15 I sent a reminder on March 19 and again on March 35 and still no reaction whatsoever - no acknowledgement of receipt, not whether it's possible or not, no telephone call, nothing. I tried escalating my request to some higher authority but could not find any contact details. The emails were sent to internet banking support (***) and ***. There is simply no response.