For hair on the face, if it was me I would cosider using some sort of hair removal cream or having some sort of cosmetic surgery although this can be very dangerous especially if done on the face. Many people have ended up a lot worse off after cosmetic surgery. But bugger accepting yourself for having a hairy face. Damn lot better without in my humble opinion.
To straighten the back without surgery, if it is scoliosis or kyphosis or both or something else then do qigong as often as you can in an environment where there is little to no electromagnetic pollution. In the country side somewhere where there is flowing water, lots of healthy trees and wildlife so you can absorb the maximum amount of chi. Do the sitting meditation as often as you can. Use the one where you say to yourself the words my back is getting longer, longer, longer. My back is getting straighter, straighter, straighter...
The exact words are in the manual somewhere.
Do this every spare moment you have.
If you can grow your fingers longer then you can grow your back straighter.
The curved back may be caused by an emotional problem (the unhappiness of having a hairy face for example) causing the muscle groups around the spine to become weaker. So you can use EFT and tap for even though I have this scolios problem, even though I have the kyphosis problem, even though I have this curved back problem etc... use the choices method and use the setup phrase I choose to have a straight back.
Once the channels are cleared and aligned the proper muscle groups will tighten and straighten the back.
Now back to the hair.. you may be able to use EFT for that too using the setup phrase even though I have hair in all the wrong places or find out what chemical or hormone in your body is causing the extra hair growth and use EFT to reduce the amount of that chemical or hormone in your body. To find out how to do that go to the EFT website and do a search on metabolism.
Beauty my be in the eye of the beholder but again in my humble opinion when you look at yourself in the mirror you are the beholder and if you don't like what you see then it is not good for your self confidence, your self esteem, it is not good for you spiritually, emotionally, mentally or in any other way.
Also deeply and completely forgive your parents for the way you are. Forgiveness is very important. Your parents bought you here probably without considering for one single moment that you may have to go throught life with the unhappiness of a curved back and a hairy face.
I hope this helps.