Not releasing my Cell Number for Vodacom calls

This is the second time I'm logging a call. I've paid my contract in full with Vodacom. The number went to prepaid and Vodacom is still not releasing my number for incoming Vodacom calls and sms'ses. I can receive all other networks calls except Vodacom. This is ridiculous as Vodacom have no leg to stand on as they don't own the number anymore. I'm losing a lot of business and personal calls due to this. My next step is news papers as I've log this on Saturday 9th April already and almost a week with NO RESPONSE.