Can't get anyone to sign consent form for laser hair removal

Hi all, I am currently going round in circles and just looking for anyone who has been in a similar situation who may habe some advice?

I was booked in with my chosen provider to habe laser hair removal patch test on 29/08 for phalloplasty. Due to one of my medications the lady who was supposed to do patch test said I will need a consent form signed by my GP otherwise I cannot begin treatment.

Now my GP has emailed me saying its bot his area of expertise therefore cant sign it, my Chelsea and west minister told me to contact GDNRSS, GDNRSS told me to contact Cheslea and west minister again!