Beware when dealing with Vodacom

Upgraded my Vodacom contract and received a new phone. Ten days later the phone won't charge anymore. I understand that these things can happen. Took the phone to a Vodacom repair shop. I reset the phone to factory settings and my screen cover worth R400 was also removed by the assistant. I was advised that the cover would be replaced when the phone was returned. The phone returned from repair and when I went to pick it up I was advised that the screen cover would not be replaced as there was no equivalent stock in the store. I was offerred a more expensive option but told that I would need to pay the difference. I said no thanks, please give me a refund and I will go to MTN a few doors away and purchase the cover for the same amount that I paid when bought from Vodacom. Then I was told that Vodacom don't do refunds. I was also advised to go to another Vodacom shop in a different shopping mall. This is ridiculous Vodacom. Please give me my refund. Why should I travel to a different mall because your shop doesent have stock. I want to get a cover replaced now while I am in the mall. It should be my decision to say NO, I will go elsewhere (much closer by) and get a cover. So ultimately my phone was returned with the faulty component repaired, but for the rest of the phone it was returned in a worse condition than when I handed it in. Is this the standard to expect from Vodacom?