Totalsports 4 week wait for size change and still nothing.

I asked Totalsports in Robertson to get a different size shorts that was purchases in Cape Town. This was on the 14th of January. Each time I have gone to the Robertson store I am told sorry it hasn't arrived. Today I was told to contact Melinda Cekiso. Her email reply to me was contact the relevant department. Nothing else. I dont think this is good enough having to wait for 4 weeks for nothing to arrive.