Given challenges with returning a faulty fridge

On the 25th of November I bouggt a DEFY fridge online, it got delivered on the 27th of November and I only connected it on the 29th of November for usage. The following day which was the 30th of November it started giving me issues, the tempreture would adjust itself leading to some fruits get frozen as it would get too cold but it would be on 3, there was also water leaking from the bottom of the fridge and the dispenser was also problematic. I called in on the 1st of December, spoke to a consultant who advised that she logged my complaint and i made it clear that i do not want to keep the fridge, i would rather opt for an upgrade and i am willing to [ay the price difference. An sms was sent with my reference number, however 2nd of December i got an sms stating my issue has been handed over to a company for repairs, i called in as i had made it clear that i do not want to keep the fridge. a lady from head office called me on the 6th stating they would send someone to check the fridge as this was part of procedure. The technicians came pn Monday and i still made it clear to them i do not want the fridge, they made note and said they would notify head office. yesterday i got a SMS stating that my service had been complete, and my issue has been resolved and closed - HOW DOES THAT HAPPEN WHEN NO ONE HAS CALLED ME REGARDING MY UPGRADE REQUEST, THE CONSULTANT EVEN SAID I LOGGED MY COMPLAINT WITHIN THE 7 DAYS PERIOD SO I AM OBLIDGED TO A REFUND/RETURN. I am not willing to keep this fridge and i can't be forced to!