Lost return package

I had multiple items that I needed to return due to incorrect sizes. The return request was approved and I dropped off the return at the Pinetown drop off point on 09 December 2018. This is more than a month later and I have not yet been refunded. I have called the call centre several times with each operator giving me different information. I now believe that the package was sent to the incorrect location. I was also given no proof that I have dropped off my return when I took it to the drop off point. This is highly frustrating and quite ridiculous. At this stage I am not sure if I will ever get my refund even though I did my part within the required time. Secondly drop off points should not be an option for returns if they don't know how to handle returns!