You must be joking data is outrageous priced

I pay R699 for 120gb night and day..this last me up to the 23 or 24 of the month using more or less data..does not matter ...I am not allowed to pay upfront i have to pay on the first of every month or else top up..it cost me R249 for 20gb on top up an it is finshed in 2 days..how on earth is this possible. .this means Without downloads only streaming Netflix and show max 10gb a day..this is unexceptable. .or is this just were we have to shut up and pay