cellc with hold important info

i have a major problem. i did a upgrade 2 days ago. the phone i took samsung s20fe. it gets insanely hot when charging. now in store we were informed that if the phone is faulty with in 7 days i can bring it back and exchange it. NOW I CALLED IN AND I GET TOLD THAT IT HAS TO BE SENT TO JHB TO BE ASSESED. WE WERE NEVER TOLD THAT PART BY THE SALES PERSON IN STORE WHEN WE UPGRADED. SO WHAT THE HELL IS THE POINT OF THE 7 DAYS IF IM GOING TO BE SITTING GOD KNOWS HOW MANY DAYS WITHOUT A PHONE JUST TO BE TOLD YES THE PHONE DOES GET HOT. THAT IS ****** RIDICULOUS. I USE MY PHONE FOR WORK. SO WHO IS GOING TO BE THE ONE THAT EXPLAINS IT????? and how do i know the person that looks at the phone is qualified. cellc should tell ppl that the 7 day period means ya sure u can bring the phone in but WE decide if u get a other one or not. what ever happened to the consumer rights Also we were informed that we would be emailed a copy of the contract before the end of day. we still waiting so i am oblivious to any kind of terms and conditions of thiers.