Unhappy customer

I open a case of ***** with Nedbank on the 17 January 2025 until today no feedback no update I was told Yolanda kock is in charge of my case I should call her but every time I call the number that ws give to me I cnt get hold of Yolanda kock no email is being answered and it's a lot of Money that I lost Nedbank can u please contact me regarding my case please