Edwardsnelson Thank You for your help. I think the pin where the phone charger plugs is bend and needs to be fixed. I have tried other phone chargers and I still have to wiggle the phone to make it charge. There is contact problem.
I got a quote to fix the socket where the charger goes in at cellphone repair shop. They want R200 to fix it. My phone is still charging when I wiggle it, when it won't charge anymore even after I wiggle the phone, then I will pay them R200 to fix it at the cellphone repair shop as I paid R800 for the phone on a special 20 months ago, the same type of phone is more now, so it will be worthwhile to fix it once it won't charge anymore even after you wiggling it.
I will stick to wiggling the phone until I have pay to fix it.