Homeloan rate review

I requested my FNB homeloan rate to be reviewed on the 12th May 2023. The application was considered but the rate was not improved. I asked for reasons as to why it was not improved. With some of the reasons given but didn't make sense, below reasoning didn't make sense to me and I asked them to clarify it for me. Bank's response: Good day, KIndly be advised that the rate is based on your overall scoring at the time the bond was taken up.

Client's follow up questions: Is it really treating customers fair if you are using the overall score when the bond was taken out to assess my rate review application. In my case the bond was taken out in 2013 and rate review is may 2023?

Doesn't the bank consider me a low risk as the years progress, as my credit score is also improving, my total bond amount is reduced and I'm paying my bond as per agreement without missing even 1 payment or not being in arrears?

I do get the fact that the rate went up because of the increase in the repo rate.