*****ed up an upgrade

Upgrade confirmed on 3rd March 2018 - Just a sim upgrade. On 1st April was supposed to have upgrade (20G data contract) kick in - it didnt and used R350 worth of airtime in 10 minutes. Phoned 3 times (once with an hour long wait and 2 disconnects) on Sunday and was told only could be resolved on Tuesday. But that it was VODACOMs fault as they had put the incorret date for my upgrade to be activated as the 31st April instead of the 1st. Phoned Vodacom now but still cannot be resolved as a 'Sim Card" was returned however no communication with me regarding the delivery of a Sim Card or even the need for a new Sim card. So now still no upgrade!!!!!!! Wanted my upgrade to be activated 1st April at the price of R329 and now will be billed on my old package with zero data and zero airtime and R29 Airtime purchased twice! So over having to deal with these issues. No communication from Vodacom - NOTHING. They quick to charge us ridiculous amounts but never able to sort out the problem