Edgars Edcon bad service

I bought a cellphone at Edgar connect thavhani mall a week or so. The phone was having problems reading some son cards. Took it back and was told the fault was my son card and had to do a sim swap.i did a sim swap still the problem persisted. Took the phone back today and no help from the staff at the shop. The worst part was when I as a customer get asked what must be done. I left the phone there as I do not know what must be done. I have never worked in a cellphone shop . I had to go and but another cellphone from another retailer. Customer care and service is a must . Train your staff to handle and resolve complaints. The customer is king .