Failed HGV test 3 times....Need advice

Started Training for Class 2 last June,
Done 5 day course with cpc module 4.
Failed first test on lane discipline (fair enough wasnt ready)
Failed second test a week later clipping curb coming off mini roundabout on way back to test centre (6 minors)
Gave up for a year and then tried again last week with 8 hours training. Instructor told me there was absolutely no reason i wouldnt pass because my driving ability whilst training was decent.
Started third test and then ran over a pole during the reversing excercise. Ive never struggled with it before but hey ho.
My instructor tells me once again that i dont need anymore training just a slap round the head lol.
Its knocked my confidence AGAIN but i really want to get this done!