Worst Customer service ever received

Worst experience ever and they duped me of my hard earned money

I bought a sound bar @ their Woodmead Branch and it was faulty I then went to the store to inquire about the warranty and how it works I was helped by Honeyboy I then brought it back I was advised they cannot exchange as I brought it back after 16 days it was booked in for repairs and I was told it will be back within 21 days 30 days later I'm a the store fighting for a refund or exchange with Frida who is refusing to give me a refund or exchange that was authorised by her manager Larry right now I want nothing to do with Pick n Pay, worse customer service received from Frida