Non existent customer service

I am completely at my wits end. I placed an online order with Waltons Back to School in November 2018. Waltons delivered 1 box of stationery in December 2018 and that was only half of my order. I have been trying to contact their back to school department for two weeks now to follow up on the outstanding items from my order. I have called them on more than 10 occasions, only to be cut off or be told that no one is answering in the back to school department. The help number given is for the call centre for back to school, who are unable to assist with tracking outstanding orders. The call centre has advised me that they continuously refer clients to Brandon Erasmus, via telephone number and email and have customers phoning them back to complain that they cannot reach him. They have also confirmed that they have been told by many customers that there calls to him are either cut off or no one is available to assist. Waltons continuously advertise there pride in customer service, is this is joke!! My son is back at school already and I still cannot contact anyone about the oustanding stationery which I have paid for in November 2018. Most dissatisfied and will never purchase anything from Waltons again.