Dell Laptop service in South Africa is poor

I logged a call with Dell for laptop issues connecting to Wifi. They contacted me remotely and did full diagnostic on my laptop. They did this under warranty and were very polite. However, a few weeks later they still have not resolved the issue. One is forced to phone the Dell 0800 number which is costly via a cell phone as they do not have a chat/email logging in South Africa. They direct your call to India or Philippines and do not phone you back as promised. If you use their chat facility, they direct you to their UK office who cant help and ask you to phone the local 0800 number. My other machine is an HP. More reliable and better quality.