Hba1c suggests your sugars must be shooting up sometime during the day, even though fasting is normal. You must repeat you Fasting and Post meal sugar values.
RDW suggests activity of red cells - how fast they are generating. I would advise you to repeat your hemogram again and rule out conditions such as anemia
which could falsely alter hba1c results.
To conclude, you must repeat:
Fasting and Post meal values of sugars
is confirmed, you must take medications to prevent complications in the future.