Driving schools

I have been taking driving lessons, preparation for the practical exam, with autoecole Flagey in Scuman. I just failed for the second time by doing silly things I normally don't do. I am now obliged to take another 6 hours lessons because of two fails. Also the exceptionally nice examiner gave me some tips, he said I need to expand my line of vision so and look horizontally rather than down. That way I can anticipate earlier. I admit I haven't been driving long and my provisional is now expired. So, costing me a fortune but I don't want to give up at this stage. So, is it worth staying with the same instructor or could it do me good to get another opinion. If so, can anyone recommend a really excellent instructor. I am taking my test in French. Forgot to mention, I am trying to pass in the notoriously difficult centre in Evere!! Desperate to get it third time. HELP!!!!!