I WANT TO SETTLE BUT THEY KEEP ADDING COSTS

My Edgars account was handed over to NBA. I made arrangement to pay. I have been keeping true to this arrangement. However they keep charging for phone calls etc that 1. I don't receive 2. Is before the date of the arrangement. My number changed beginning October, I got charged R 100 for phone calls to a number that is out of use. So if there is no cost to NBA why am I being charged R 100.00 for phone calls to a number that is not in service anymore the day before I am to pay my R 100 as per the arrangement. Historically this has happened many times where they just rack up an extra R 100 here and there for phone calls when I have been paying. I have the proof of payments and sent an email over the weekend. Nobody has even done the effort to acknowlede receipt of my email. I sent two emails which they seem to be simply ignoring. Email address is correct since I rep**** on email from them. Credit Ombudsman? I was offered R 3700 as a settlement amount and will settle once the \********"phone call charges gets removed from the account."""