Still no response from Vodacom

I phoned Vodacom on the 30th of November to downgrade my cellphone contract. I ask to downgrade to the Flexi 55. In December I thought ok I need to wait a month. It's now January and I'm still not downgraded. They had on the first call confirmed it had been done. On the second call on the 18th of December they promised to call me back as the system was down. Big surprise. No call back. <br> <br> I tweeted them directly after the above mentioned post to HelloPeter. Still no phone call! <br> <br> I'm due for a renewal and I can take my number and my business to anyone I choose.