Bad service

The 24th of November 2023 I bought Goldair airfryer at Pick n Pay Tygervally mall for my mom as a gift .The 28th of May 2024 ,I took back this item back cos it was no longer working . As per the Supervisory that was assist me on that day, she advised that the manager can only exchange the item for me but no refund, I was told that they have track offloading on that day and they advised to come back the following day to get my exchanged item .I was told to leave faulty item and the slip at Store .The 29th of May I went back to the store to get my item ,I was told that they could not get my air fryer and they advise to take a different brand that was way too expensive and way smaller that than the one I bought from them and I refused. I was told that they will give me a call a soon get this item. I did not hear from them since then ,I called the store to find out about my case , I was told to get it from other stores that might have the this item, I told the lady, that this person I bought this item for is mother who is 78yrs old and she can’t be going up down caring big boxes ,I asked them to get this item from those store and I will collect it for her at Pick n pay Tygervally mall .Donaven the store manager that was present Saturday advice that I should come collect the refund even though the previous manager could not refund me while I was at the store day one. I want Pick n Pay Tygervally replace my mother’s air fryer as soon as possible. Donaven the manager advice they cannot get this item to be delivered at Tygervally Mall or else I can go and log complaint if want too. Please assist team.