Unprofessional and ********* in their business practices

I was told by a credit controller that they will give me 50% discount to settle my account and then changed the terms and then a silindile person who got the escalation query decided that I am not worth her time when I managed to get the funds to settle my account and sent an email saying I acknowledged my full account. This was unprofessional, ********* and most of all *******.. I will be escalating this to the credit collections council for review as this contravened the consumer protection act. I want to settle my account and wanted to negotiate a settlement discount.