the worsed service ever

I went to open an account with them in July to buy a TV and decoder, at first i was happy thinking that they were acting in my best interest. The sales person that helped adviced me that he will take care of eveyting while activating my account so i can go around a check what i want to buy. I paid and left the following week i wanted to buy something for my daughter at edgars active only to discover that i font have any credit anymore to my surprise so the sales person at Edgars active helped me to cancell things that i had no idea that i had as i never gave any autharazation to it. Ive talked to a guy called Tshepo at edcon who adviced me to go back to jetmart to refund me. I did that to find out that the manager Ashely telling that he wont be able to pay me back as the person who helped me worked for an agency, so i asked him how will i get my money back because i really need that money back into my account as it is their fault that they activated those insurances. Till today i was never assisted. So how do they let agency people help us as customers and dont take the blame for it if they do us wrong. We as customers should we suffer for such mistakes done by their people.