Out of control blood sugar levels. Year.

I've been diagnosed with type 2 diabetes 4 years ago with a RBS of 320. I've been on medication and checkups every 3 months ever since. Over the last 1 year my blood sugar levels have been over the roof and no amount of medication or dietary changes have been able to bring them to normal. The doctors have been pushing my medication by 250 mg every 6 months and yet no improvement. I am constantly tired can sleep during the night and difficulty waking up or staying awake during the day. I went for a few other opinions and 3/5 doctors thought that it could've been type 1 diabetes instead. I am not sure I much diagnosis is correct or what to go for. I have had PCOS for 17 years now, stopped all medication for it 6 years ago and it's under control for the past 1 year.