Shocking service from ABSA private banker

I have been trying since 27 June to get a tax free investments that matured at Investec transferred to an existing tax free savings accounts at ABSA. I am a Private Bank client and have spent hours on the phone, sent numerous mails, filled in so many forms and sent Whatsapp messages galore to my private banker Mohammed Tahir Kahn but this has still not happened. Investec has contacted me so many times asking for the information from ABSA that I am embarrassed. I have been an ABSA client for 52 years and this is the worst service that I have ever had. To say I am extremely disappointed will be a major understatement. Really really shocking service.