No feedback given from Complaint

on 13 Feb 2016 we were at this branch the waitress had not given us a side plate tried to get the attention of the other waitrons but they congregated at the entrance chatting this resulted in us putting down a serviette on the table and placing the shells there she checked up just once on us saw the serviette and still didn't give a side plate after asking for the bill I called the Manager to explain the incident. A friendly white man listen and apologized however he explained that he will provide feedback to this incident insisted on taking my number which I gave him and told that he will provide feedback on 16 Feb 2016 has he was in training that Monday. To date no feedback was given no call no sms nothing, very disappointed with service and I explained to the Manager there is a JD in Malvern were I reside but we drive to Galleria for the food and service. Why insist on taking down my number if he wasn't going to give any feedback ?