Contract issues

When my contract with Vodacom ended, I presumed that I would continue to be charged R69 a month. A few months later I noticed, i was being charged R120. I called Vodacom and after lengthy discussions, they said they would put me on a contract for R79 that would commence 1 May 2016. It would included R110 airtime, 250mb and 50 free sms's. Today is 1st of May and when I checked I only have R110 airtime, meaning that the contract has not started. I sat on the phone for one hour this morning and finally gave up waiting for someone to answer. How can they expect you to hold for so long. As usual this is disappointing service from Vodacom. I expect them to rectify this now or I will change to Cell C.