You should ask for an ED clinic appointment, if you haven't already.
If you want to have erections for sex, they should try you on the injections, pellets, or creams.
You should also ask for a pump for penile rehabilitation.
It's also worth asking for a pack of 8 100mg Sildenafil or 20mg Tadalafil. These won't work if you really have no nerves, but some people do find that actually some nerves were spared when they had been told none were, so trying one of these every couple of months would pick up on this case of still having some nerves working, which you could then work on improving. Your GP could prescribe these to try, and possibly Vitaros cream too, but for the injections or pellets, you have to be shown how to use them by the ED clinic before your GP can prescribe them.