Its good to see you back in one sense, but obviously I'd far rather you were getting the help you need.
First, raising hormones naturally is dependent on having a functioning hormone system. As a TC survivor, your body is no doubt calling for Testosterone but the surviving testicle can't produce it, so no attempt at increasing the level naturally will work because the production via the "factory", the testicle, is maxed. Having said that I think it is worth giving the NHS one more shot.
The Testosterone levels you indicate suggest there is every chance of getting treatment via the NHS now the new guidelines are out. They are linked under the guidelines tab on the main site and say TRT can be initiated with a Serum T reading of up to 12 Nmol/l.
Therefore, I recommend you print off the guidelines, make sure your doctor gets them a few days before you go to see him/her and then argue your case. If they still refuse, inform them you will be complaining to the PCT.
I think you will find a more compliant doctor then.
all the best