So sorry to hear that things are still in such a mess, that's really not good.
I can really sympathise with you about the toilet issues. I know about going to the toilet every hour or two at the absolute most, and always having to identify where the loo is, it is a standing joke here. Accidents happen every day, pretty much, and it is a bit of a nuisance. With regard to bowel control, I have got better with that, knowing that I do have some control even if I cannot feel it, but accidents still happen.
Several suggestions. Have you managed to get a referral to one of the PN specialists yet? Although other consultants are now starting to have at least heard of this condition, these doctors on the list are much more experienced.
Have you still got the TVT sling in place? And if so - have you thought of having it removed? Mesh removal helped me considerably.
Have you got any psychological support? You should be able to access this through your GP. Longterm problems like this can be very challenging, and you shouldn't have to be coping with this on your own.
I have a rule, in that I never turn down any help that is offered to me. Counselling? - yes please. Support group? - yes please. Something like this can be socially isolating - it isn't very easy to discuss it with your friends. I've found the knitting group at the local pain clinic to be very supportive. I know you don't have pain, but numbness is difficult to manage too, and you need support too...
Another thought - I am sure that resources vary from place to place, but just to give you an example - here in Wiltshire, I have just discovered that I can access free psycho-educational courses on a whole range of issues which include managing longterm health conditions, I shall be going on a couple of these courses in the New Year. I would expect that similar resources are available to you - I was told about them by the counsellor at my GP surgery. I had no idea that there was so much help available.
I hope that some of this might be useful to you. Hang on in there!