Confused about HbA1c

Hello, I just got some test back from my Endo as I am being treated for Low testosterone. I got the following test results back: Test: 7.5 Vit D: 10nmol/L HbA1c: 42.0.

It's the last one I wanted to talk about, from having a snoop around here a lot of people are talking about have levels of 6 or 7. So with mine being 42, I am very concerned. Am I missing something? Either way what are some good tips on bringing it down? Thank in advance.