Vodacom refund

I have changed banks in May and my vodacom debit order could not go through. I arranged for debit switch with my bank but it also got delayed. I called vodacom and arranged to pay physically which I did on June 20 and the 21st noticed that the debit went through. I called to arranged for a refund which they promised will happen within 5 working days. I even emailed my slip as proof of payment as they requested. I am still waiting for my R199. 01 refund and no communication is coming forth.