RCS loans - harassment

I app**** for a Game Loan and everything was smooth running, received money in my acct the same day. I was retiring the end of June so I just needed some cash till then. 1st Debit Order went off my acct on 24/6 for 635.97. On 18/7 I requested a settlement amount and was given R4799.53 which I paid on 19/7 and emailed proof of payment and requested a paid up letter, which I didn't receive. There was no debit from my acct for July. However, on 24/8 there was a debit order for another R635.97. I requested the bank to reverse this as I knew I had settled this loan. Emailed RCS explaining that the loan was settled. Not receiving any reply, I called the customer service centre, which in itself is a mission, I listened to music for 30 minutes. I was then informed that when the settlement amount wss given to me, it did not include the July the debit order that was supposed to go off end July. I felt that this had nothing to do with me and I was not liable if someone didnt do their work properly. To get RCS off my back, I decided to make a payment arrangement of R250 per month as I was now being charged fees, interest and arrear emails and calls, the R635.97 now became R853... I was going to pay yhis R 250 by eft on last day of the month. Everything was in place, was asked the relevant questions, so I thought this was now sorted. Only to find another debit order of R187.48 going off on 25/9 which I asked to be reversed again, knowing that a payment agreement has been made. On 30/9 did eft for R250, received numerous sms's of non payment and eventually a statement still owing R710. So from R250 I only really paid R100 plus, apparently I was still being charged for sms and calls of demand as well as interest. During this time the smss and calls continued non stop even though I was honouring the payment arrangement that was in place. I made the eft payment on the 30/10 as agreed, but still sms and calls of demand never stopped. I have now been handed over for a loan that has been settled and having a payment arrangement in place that was being honored. I woukd have maybe understood if the arrangement was not being honored, but it is ..... I am a pensioner and dont have money to throw away that the reason for settling debts in the first place, I just feel that I am being taken for a ride here, having been treated like this, I will never, ever refer someone to RCS doesnt matter how desperate they are.