Unexpected price increase

I received an SMS stating there will be an increase to my monthly repayment. When I called Vodacom the very helpful consultant that I spoke to assisted me to migrate to a cheaper contract however there is now FEES that I have to pay. Never in my experience have I seen that a term cell phone contract increases in price, deviating from the agreed upon contract amount. When taking out this contract online the consultants went through the T's and C's telephonically but never mentioned a possible increase. The long and short of the matter is that I cannot afford to pay the increased price and I would like Vodacom to call me and discuss the following two options:

1) we cancel the migration and the price stays the same for the duration of the contract 2) Vodacom waives the migration fees

The increase is not acceptable as Vodacom is breaching the contract we had signed.

I hope that Vodacom will be able to settle this matter in a way the treats the customer fairly especially considering the state of country at this point in time.