Paying for their mistake

Multichoice have billing me for an explora they delivered to the wrong address. <br> <br> I ordered the promotional explora in beginning of January and was assured that it will be delivered in a couple of days, after waiting for a couple of weeks I then enquired about it. It turned out that their delivery service had delivered it to the wrong address. <br> <br> Multichoice now insists that I Should pay for the explora that I don't have, including the service from January to date. Every time I call to clarify the issue I am told that it belongs to a different department and it will be \escalated". My bill now stands at R4300 and my service has been suspended because I refuse to pay for their mistake.<br> <br> They have promised to have someone from DPP call me and rectify this situation but no such call has come forth. The DPP number that I was given"