Malfunctioning laptop & bad service

I bought a laptop (SMD CONNEX SLIMBOOK 2 BUNDLE GOLD) (IMEI 1: CGTL1420G ********** 39) at Foschini Wonderboom Junction on the 23 February 2019. I returned it twice to the shop for mulfunctioning, on the 23 March and the 5th April. To date I have no idea whats going on. The consultants are not helpful as they indicated they don’t deal with laptops, they are only selling them for the contractor/service provider contracted to Foschini. I was told that the person who deals with laptops will call me to provide feedback, this has not happened. I send an email to customer service & even called them. Again I was told the person dealing with the case will call me. This is very disappointing and frustrating. I don’t understand why I have to suffer for a faulty malfunctioning product. I decided not to pay the account, thinking that they will deal with my problem. But this has not helped. Instead, Im receiving emails and sms's informing me of the account that is in areas, that I must pay to protect my credit. Why must I pay for something that I do not have. I have been the client for Foschini for years and to received this kind of treatment is very disappointing.