Harassment by Nimble Group

I have an ABSA personal loan and due to a change in my financial situation, I have gone into arrears. Nimble Group has been appointed by ABSA to collect on my arrears. I have received numerous calls from Nimble Services, their consultants are persistent and extremely arrogant. I have advised Nimble Group on numerous occasions of my intentions of making a monthly arrangement of R500 which commenced on 26 July. Since then I have received a call every single day from Nimble Group. I have addressed an email to Nimble Group and ABSA advising that I can only afford R500 per month and it is an effort on my side to pay something towards the account however, I am continuously being harassed with calls. Nimble Group has now started calling my office after being told that I cannot take calls at work. The continued harassment will not change my financial situation and I have advised them of this, once again by email. These calls are stressful and frustrating and something needs to be done about it. Financial stress is not easy and I am making an effort to pay something towards my account even though it may not be the required amount but this is due to financial difficulties. I am hoping that HelloPeter will be able to assist me in this regard.