Warranty

I purchased a Samsung A2 core at your Pep Home store in Fourways Mall December of 2021 last year. 2 weeks ago the phone stoped charging I returned it back as it's still under warranty I then now today get an SMS that the phone has been booked for repairs and I need to accept or decline a quote from Vodacom fourways. I called and found out I need to pay for access upon fixed of a screen. I never booked that phone for a screen repair so it was working fine it just stopped charging. I want my refund back if these phone is not under the 24 months warranty . I am told by Vodacom I dont have in insurance. I want my refund before I take this matter up with the ombudsman