Bad service

After numerical calls with personal that can't resolve my problem or after contacting Tobi and recieving a call back the call only rings with no one answering. I would like to know why is the data signal so poor in the Northern Cape ( Kathu ) and why if i have video data available does my normal data been billed when watching videos? Now i have data that is going to expire and i could not use the data as Vodacoms data reception was a mess!