FAULTY PHONE

I bought the Mobicel phone from Foschini in Kenilworth Centre in April 2020.The phone gave me charging problems and I took it back to the store on the 19 August 2020 as the phone still has the guarantee. They promised to take it back to the supplier and contact me when its back. On the 5th of October I went there again to check it as I struggled to get hold of them on the contact number they provided. To my surprise they told me its still with supplier but I need to top up with R400 for that phone to be fixed. I refused and told them I want my money back because what I paid for the phone was what I budgeted for. So if they are selling faulty phones, then I want my money back so that I can buy the phone somewhere else.