Awaiting stock and feedback

I went to Hemingways Pick 'n pay on 26 April 2018. I was interested in the "All four" special @ R 100. They didn't have 2 kg sweet potatoes available and I asked the manager if I could pay for 4 (R 100) and only take 3 produce and they can contact me when they get stock in of the 2 kg sweet potato. They scanned the (normal) potatoes, the tomatoes and the cashier scanned the gem squash twice to make up the R100. And then took the slip and wrote down my details at the info counter. I'm just concerned because I haven't received any feedback - I noticed the lady that took the slip from me after I wrote my details on the back just slipped it under the till. I must admit I haven't tried to contact the branch via the PnP website because in the past I haven't had any success getting contacted by using that method. I would just like to be kept up to date - whether they have the stock or not. Or could I just get something else if they aren't going to receive any sweet potatoes (2kg)...