Bad service!

In October there was a promotion running at the Canal Walk Clicks branch, Cape Town. The promotion was “Buy any gliss 400 ml shampoo or condition and received a free hair serum”. In October I purchased both the shampoo and conditioner R72 each, which entitles me to 2 free serums. At the time the store was out of stock of the serum and I left my contact details with one of the supervisors in store to contact me when they receive stock so I can receive my free items. However, I had still not receive any feedback it’s been about almost a month already. I’ve been to the store on 2 occasions asking about the stock arrival and they’re said it’s on its way and they will give me a call. I understand the store might be crazy busy with stock taking, but give me feedback as to how long I’d have to wait or if you’ve completely forgotten. Clicks has always maintained a great image and customer service in all clicks branches that I shop, but this incidence makes me think otherwise.