Cash Purchase on the Vodacom E Store

I purchased a cellphone on the E Shop. I did not like the model and wanted to return it within the 7 day cooling off period. No one in the call center can help me return the cellphone yet they offer the service only to contract clients. I went to a Vodacom4u and no one can help there either. I tried the Chatbot and Samantha Sinegugu McHunu was supposed to be assisting me however there is no reply from her after explaining my situation. This has has to be the worst service i have received from them in all the year i have been with Vodacom.