For any electrical and wiring work, you need to hire someone who is qualified. This person will be an electrician. Don’t just get anyone to do the work – it needs to be someone who is fully qualified and has plenty of experience.
Don’t take people’s word for it, either. You should ensure that people are qualified electricians when they are going to carry out any work on your property. Check certificates and that they are a member of the trade.
Never be tempted to carry out any electrical work yourself. It is incredibly dangerous and you could get a serious electric shock from tampering with wiring or electrics. Even if you do manage to do the work safely, you will be left with a bad finish that is clearly not professional. Sockets and light switches that aren’t completely straight will really ruin the look of your property and you will wish you had just hired an electrician.