Posted: 04/07/2017 at 18:16
If you will forgive my saying but you've made a bit of a pigs ear of your Bonsai - sorry - not trying to be rude
You don't really "trim" established Bonsai as you would with a full sized tree/shrub - you "shape" them as such to follow the growth.
There is also no need to leave the wire on either - it has already done it's job in shaping the mature branches. You only need wire when you have new growth and you have decided how to balance your tree.
Unsure from your pic whether the pot is "the" pot or whether you have an inner pot ? Could be worth turning it out and seeing what sort of root ball you have.
There are several Bonsai Societies in the Uk - try contacting them and see if you can get some advice from them, Alternatively, I'm sure there is someone on this forum who may be able to help - hopefully they will spot your thread and be able to help you