Hi PMF,
You whinge if you need to - there will always be other members like myself to listen.
First, do you feel like sharing the cause of your many back problems? Mine have been caused by multi MVAs, motorcycle accident which crushed neck vertebrae and 3 further whiplash injuries. I have a multitude of other Neurological and health problems including severe Depression.
SCSs are not an option over here for my situation so I have Lidocaine Infusions 4 weekly and take oral Ketamine and oral Morphine. Ketamine and Phenytoin Infusions are also available. This may seem like a lot of pain meds, but I have Neurological Hypersensitivity and Static Mechanical Allodynia and the combination can reduce my agony by 50% at best. The Infusion and Ketamine are most effective and have fewest side-effects.
As for your Depression, I am very concerned that you are receiving the correct support and treatment for this. Being trapped myself, I know how it makes all our other problems much worse. Do you see a Counsellor? Many find that helpful. Anti-Depressants are an option - I have to take them as well as meditating to help keep my mind clear and strong enough to get through the days.
Then there is the wonderful support you have witnessed from the members of this Forum. It is the best place to connect with people who understand your problems from the inside. You can also just come here to whine, or vent - or crack a joke on a good day.
Whatever support you feel you need, I - and others - are always around.

Dave.