"Cancelled procedure"

I feel utterly gutted and let down my the system. Its not a huge health issue. I've waited my time and been patient. But i've got yet another fight on my hands

After a cancer scare in June (dealt with very quickly), I was let down by the aftercare. My lump's not cancerous so it's no longer important. The clinic I saw failed to forward a referral for removal. Cue a 6-week dance to get a GP appointment. GP reluctantly made the onward referral, stating the clinic should have done it and that I may not hear back from the referral.

Now here we are and I finally get someone to listen about the pain and discomfort and have a procedure scheduled

Only for it to be cancelled, no explanation or timescales and rudely told I'll be on a wait list if and when the clinic is rescheduled and that it's cosmetic and not hurting me at all. 

So now I'm left with no idea of when I'Il be out of pain, if ever and with my mental health in tatters, as I yet again feel let down by NHS. I've fought for all the treatment I've ever had on a hospital, I've fought for family's treatment in the past. It's exhausting. And there's no point going back to my GP, it'll just make my fragile mental health worse trying to get an appointment.