Double intrest and the lies

I recently took an additional loan with Directaxis. They settled the other loan then gave me the remaining money. Come month end they deducted the original installment amount for the previously settled loan and told, whilst going through the whole transaction I noticed that the normal intrest and service fees had been included whilst the loan was already settled. I called them and they said to me the settlement amount included in itself the installment which was 9 days prior, then I proceeded to ask how come that money did not come from my settlement instead it needed to be added with my installment. I was told that was the agreement then I said please forward me the voice recordings of such an agreement, even now I have not received any.

My issue is that a settled loan does not accumulate intrest because already the new loan had generated an intrest as well. So it looks like Directaxis is running a mashonisa, they are not honest and when you call they pretend as if they are listening to your story. This will be the last time I ever do business with them and I guess I trusted them because of they are part of FNB. they are just dishonest and greedy