Unfairly treatment

On the 1st of November I bought a Samsung Ao5S at Ackerman's located at Elspark.the following day when I was backing up my stuff on Google the phone started getting extremely hot then it went blurry, I then took it back to the shop, the manager I got which is mpho gave me no choice but told me I either book the phone for repairs or I take it back with me & take it to abo my friend. because she assumed the phone was liquid damaged, Samsung called & told me the phone was back from repairs I asked what was the problem,the said the phone had a problem .so now that the phone is back & I think Mpho is now satisfied . I requested a refund.I emailed ,called the customer care with no response 😕 today they'll say this tomorrow it's another stories. I'm really tied now . customer service told me they were supposed to give me a new phone or give me a refund because it was within 7 days .