Have you try with other banks ? eg HLB, Affin

2.31 for 9 years - slight high

should below 2.3 on the current market.

I can emphatize with the sales person, because usually we can tell more or less which bank is giving the lowest rate, in the market. The thing is if sales person were to submit one case to 8 banks and each time, ending up only 1 bank ( presumably with the lowest interest) gets to close the loan, the other 7 banks would shy away from processing applications from this sales person in future because all their effort do not turn into success and have "wasted" a lot of their time.
As such, those banks would rather concentrate of cases that have "higher" chance of closing. Therefore, sales person need to play fair with the banks so that they are treated favourably too.

Usually, sales person try the multiple banks application only, if the case is borderline eg one bank approve but others reject, so as not to waste precious waiting time. It is not so much on comparing interest rate. Just my 2cents.