Legal fees after a month

Good day My name is Puseletso Lebogo.am having a bad eperience with Hammond pole Attorney's. On October ive settle my 2 accounts with them .ive received my settletlemnt letter from Obed Onkosi for my Vodacom account.and Nazereen for direct axis account. Before paying everything on my discounted accounts ive asked if is there any amount that needed to be added Obed said no.ive asked this question because i wanted to pay everthing since i was retranched on september 2017.Boooo after a month of settlement of my accounts am getting calls from Thabo and Obed telling me i must pay legal fees that i wasnt told.i know is december but your stratagy is not right at all.am not willing to pay something i was never told.worse part obed told me i must pay for this amount he sended me an email saying he will give me discount i will pay R900 am stilk standing i wont pay this collection lawyer they like to rob people.i didnt sign to say am going to pay this legal fees i was told about settlements.and i did pay them.so????