UNFAIR BILLING AND BAD CUSTOMER SERVICE

I got a Blackberry cell phone contract with Bayport Financial Services in April 2012 and stopped paying as I could not afford it due to being a student. Bayport carried on billing me which I understand with interest. In September 2012 Bayport ended the contract and Billed me for an "Outstanding Capital" of R 3,229.10 that I do acknowledge! The account was then sitting on R 4,655.24 I then got billed an additional "Outstanding Subscription fee" of R 931.92 that I have no knowledge or understanding of! From August 2012 to October 2012 I was billed interest and Legal fees that I also take full responsibility of, the account was now on R 5,981.35 that I am happy to take responsibility of. In October 2012 they started billing me a monthly subscription fee of R 230.00 that I have never agreed to or that I was aware of this subscription carried on for 18 months totaling R 4,140.00 with interest the account was then on R 13,300.19 March 2014 that I was not aware of! No calls or nothing! I was still charged interest the entire time. In October 2014 I joined a debt councilor and started contributing towards the account . The interest was supposed to stop yet for 14 months I was billed more interest than my contribution! When they stopped the interest in November 2015 the account was then sitting on R 16,611.24 I had made no progress at all! After stopping the interest in November 2015 my contribution started bringing the account down I had in total contributed R 13,469.54 up to July 2018. I decided to request for statements from creditors to settle them in order to remove myself from debt review and only now discovered the above mentioned as I never received any statements from them only to find there is still an outstanding balance of R 5,835.50 that I was told to settle. I want them to credit me for the subscription of R 4,140.00 and credit for the interest after starting my contributions of R 4,328.87 I will then be in credit / refund due to me of - R 2,633.37 I had tried contacting them but end up with no success and holding the line with no answer! the phone was also dropped in my ear a few times! I seems impossible to get hold of them or any feedback! This is the most frustrating and aggravating creditor I have ever dealt with!!