TelkomSA-R is useless

Ever since telkom has being roaming on vodacom, I have being having ever issues, i always select telkom SA as my preferred network not even 5 mins later it switches back to TelkomSA-R. I have telkom data only and everytime it switches to TelkomSA-R I lose internet connection. it's very annoying and going to cost you alot of clients.

I see only two solutions,

1. Make telkom data only work with vodacom roaming or' 2. better your network all over so there wont be any need to roam in the first place.

it's really frustrating.