Cancelled order not collected

I ordered an upgrade to my existing data package with Vodacom online on Sunday, 24 May, and this was delivered to me on Tuesday, 26 May. I had, however, decided to cancel the upgrade and return the package unopened that same day. I didn't think this would be an issue as their website claims that they have a 14-day return policy. I have now called Vodacom's call centre four times (I received a reference number on Friday, 29 May) to arrange collection of the package (still unopened), but it is still in my possession, and no-one has given me any indication of when collection will take place.<br> <br> I'm hoping that this can be sorted out as soon as possible, as it has become a time sensitive issue.