Rude, unprofessional staff that shouts at custoemrs.

I was retrenched early this year. Since then Edcon has been calling me every day, I've told them every single time that I have been retrenched yet I'm still getting calls to pay Edgars account! Today was the icing on top, someone called me as per usual, when I tried to tell him the same thing I told all the other Edcon call center people that keep calling, he starts shouting and screaming for me to make a plan! Make a plan how? How unprofessional of your call center consultants to start shouting and screaming at people just because they have been retrenched! It's uncalled for, unprofessional! I have no words to how edcon has treated me since my retrenchment! where on earth am I supposed to get the money to settle, when I did ask for a settlement amount in december, I was told they can't give me a discount. Is this how yo treat customers! So unprofessional, rude and ***********. Highly highly disappointing. Does the staff not get any customer service training?