This is so frustrating

My membership with Nedgroup underwritten by Medscheme terminated in March 2021. The is a refund due to me. I received an email on the 8th September with a payment advice dated 10 September. I then queried if my banking details were correct and from there it's a nightmare. I have sent my banking details and ID numerous times, I even received a call from one of the consultants and was advised everything was processed. It is now the 29th September and again after received numerous payment advices, I just received another one for 01 October. Emails take days to be returned and seems like no one is reading the previous call comments as they keep asking me to email the same thing