unfair price increases

i took a data contract that was discounted to R29.00 per month for 24 months that i received vodafone K2401-z modem, alcatel one touch 3000+ starter pack. now i get sms telling me that subscription increased from 69.00 to 75.00 per month.i called customer care immediately and consultant could not answer me and said systems were offline will call me back to this day no call back was made .<br> normal 1GB is R150.00 i was discounted R121.00, there is no way that i will be paying from R29.00 to R75.00 per month. my discount cannot be increased with over 70% of what iam currently paying for . you either correct your billing or i will ensure that no debit order will go through my account and will tell everyone how unfair your rates are Cell C increased their rates with a fair amount but R75.00 from R29.00 it will never be debited in my account and i will escalate the matter to ombudsman if this matter is not resolved to my satisfaction. i gave your call center a chance to explain and they failed i am using this platform to give you a chance to explain yourself and rectify my accoun