Bad customer service from Tygervalley telkom

On 23rd October I went to the store at Tygervalley to UPGRADE my handset. I was given an OPPO A74 and told this was the newest phone in the market and I would not be disappointed. The phone takes exceptional photos.

On Friday 29th it stopped charging altogether. Saturday morning I went to the store as the 7 day policy was to apply giving me a replacement handset. Only to be told the phone will be booked in for repair as it was 8 daya since the 23rd a claim I vehemently reject. The store manager was off for the weekend and I asked for head office number TO BE TOLD THE MANAGER IS THE ONLY ONE WHO CAN RESOLVE MY ISSUE. now that to me is bull. They want to punish me for selling me a defective product. I am the one inconvenienced and they are just nonchalant. I have never been so angry in my life...