*****ing 2G's of Data

I upgraded a Data Contract to a Voice Contract and in the Vodacom Shop at The Grove I was told that the remaining 2G's of Data on the contract would need to be used by midnight 29/02/2016 (R150.00). We tried to us the Data but found that there was no data available - after 2 calls to 082111 I have now been told that for the 24hrs of the 29th February I have no active contract and that all data was lot at midnight 28/02/2016...this is not acceptable as each blames the other for miss information and I the consumer am the 1 to lose out. Poor service, poor understanding and theft of my data has left me as mad as a swarm of bees and not the Vodacom Shop or the Call Centre are prepared to do anything to appease me the customer