We have 4 different riute sources of bandwidth to ensure redundancy and performance equalisation. As you probably heard at the beginning of this year SAIX had some technical issues which degraded all the ISP'S services who relied soley on them but our services continued to perform because of the supply alternatives.
2 are fibre, one is miocrowave and one is satellite. Our engineers monitor demand on our various routes and backbone and constantly make adjustments to the supply on those routes.
So when are you going to get your own IP allocation, so you can stop NATing people, or being listed as your upstream ISPs... ?