Refund cannot take this long

I downgraded my package to compact from premium, the debit order went off after I paid the R430 and I called the call centre to do a refund. Not only was I on hold for 30 minutes, I was told the refund takes 30 - 40 working days. How is that even possible? DSTV did not hesitate to take my money in an instant. I want my money back and if they keep it for that long I also want the interest that accrued with it. And your agent was so rude and the whole time I was on hold I could hear everything going on in the call centre, including her typing and ignoring me (after requesting to speak to a supervisor) and the chatter and laughter of the call centre agents; very unprofessional. This is why people are cancelling DSTV and getting uncapped internet. A lot less hassle. GIVE ME BACK MY MONEY NOW!