Withholding refunds and terrible customer service

It's been 3 months and still no resolution on my credit note. Vodacom is very quick to state that you must pay them immediately for anything but the moment they owe you, Vodacom will think of every excuse under the sun not to refund. How many times do I need to phone and send emails never to hear from Vodacom. I've been told I'll get a phone call from a Vodacom supervisor since the beginning of the week and still nothing. I'm still waiting for my reverence number, my phone call, answers to my emails and MY MONEY BACK! Withholding fund is ***** and a ******** offence. Vodacom sent me a credit note for money you owe me, so after 3 months I'm tired of waiting. Refund me so I can move over to MTN