unidentified spider in garden in Cape Town

unidentified spider in garden in Cape Town

Observation - unidentified spider in garden in Cape Town - Southern Africa. Description: It's about 5cm from from the back of the back leg to the front of the front leg. It's been sitting

It's about 5cm from from the back of the back leg to the front of the front leg. It's been sitting in the same area for days and it's web is very large.