Upgrade nightmare of note!!

To whom it may concern, I've been a loyal Vodacom customer since the very beginning and have no regrets as they are arguably the best service provider in RSA. Recently I was due for an upgrade via a RED special, I gladly obliged only to find out days later that I am unable to make or receive calls - the lady who did the upgrade failed to mention that it was a data only upgrade (Even after I asked her if it would remain the same) therefore removing my ability to make or receive calls. Immediately I took action and called for a request to cancel this nightmare of an upgrade. Being under 30 days, it should be an easy process to cancel and return me to my original contract, yet I am given the run-around with meaningless escalation mails with no actual action being taken. Vodacom - I am officially tired of your avoidance tactics - I can clearly see you trying to delay it to charge me for this unnecessary ordeal. Please sort this matter out immediately, after all it was of no fault from my side, your upgrade agents are shady and are purposely withholding information when upgrading clients, this should be investigated.