B+D auto body spares is a ****!!!!

I bought a car bumper for R700 after I had an accident, only to find out that it's the wrong one, went back for exchange they did not have what I wanted, and was promised a refund, that was a month ago, since then they've been sending me from pillar to post I had to use fuel to go there every second day, until yesterday when I told them I'm taking the matter further. Today they sent me R540 instead of R700 and when I query that they telling me that they took the service fees of which I am starting to of it today. B+D auto body spares is a ****!!!!