Bad service

I went to cash Crusaders in Alberton on Saturday I bought a generator for R3800 I was told it only had a 48 hour warranty /guarantee I took it home only to realise it wasnt the correct size. I wanted to return the item today and was told I cannot return ..I'm not sure of cash Crusaders stipulations and how they work ..but as far as I'm aware items have a 7day return policy if not altered broken or handed back in any less condition it was bought in .it is literally one and a half days later. I was at a cash converters that same day wen I bought a faulty unit and was not questioned at all ..seems thier policy is much better