Questionable business practices

I have experienced the worst customer service ever from this company. 1. They' call you to make payment arrangements to debit from your bank account and they do for a few months and stop and claim you never had enough fees in your account like how? Whereas i made an agreement with them. 2. Call them directly to settle your debt and they promise you that they will send a settlement letter after 7 working days and it's been almost 4 weeks already and i've been calling them every day Monday till Friday for all the previous 3 weeks each time i am told they can see my payment they are just waiting for accounts dept to re allocate the payment and all that. Each time I call i get a different agent, i was given Walton Mabara's number but no matter how many times you call during business hours the phone will ring till you give up. I am really sick and tired of the ****ty service i've been getting from Brooks and Luyt