Terrible service from Home Loans

I've had it with Nedbank home loans! I've been trying to get my home loans details corrected for 4 months now. The number of months remaining on my home loan documents and the months that I've actually paid to date don't match which makes me doubt the calculations of the balance still outstanding on my home loan. I called the help desk first time in Nov 2024 and they told me they would correct but they didn't. I phoned again in Feb 2025 and they kept transferring me from one desk to another and each time I'd have to brief the consultant and to go through authentication process over and over again. No one seems to know what to do or where to redirect you. It's been another month and the records have still not been fixed. Yesterday I received another letter showing incorrect details. I'm in the process of switching my bond to another bank because of poor service and now I am worried they will transfer incorrect information to the other bank.