The HbA1c test is either mmol/mol or expressed as a DCCT percentage %.
So you must have been 11% because the mmol/mol figures are 20 and upwards. (you would probably be very dead from low blood sugars if your HbA1c was 11mmol/mol)
11% is equivalent to 96.7mmol/mol or 14.9mmol/l.
http://www.diabetes.co.uk/hba1c-to-blood-sugar-level-converter.html
The HbA1c test is an average of your blood sugar levels over the previous 2 to 3 months.
Your mmol/l meter readings are snapshots of what you are at the time of the test. The 2 things are not comparable.
When you were diagnosed you may also have had a plasma fasting glucose test, and that would be in mmol/l and can be compared.
You really need to get a print out of your test results as all this will show on there, and you will know where you are starting from. At the moment I'm not sure you do. Please correct me if I'm wrong.
All the different measurement units are very confusing for us all but it is important to know what they all are.