Vodacom doesnt deduct 3 years payments to their attourneys

I have been paying MBDCS attourneys for 3 years to settle my arrear account Ref. ********** 55. After 3 years and payments made +- R4000.00 I asked Mbdcs for a statement which I never recieved until today. Email address ********** I kept on mailing since 2015, never recieved nothing so I stopped paying because I had no reply... I then mailed vodacom many times with my id number to please assist me to arrange for payment on the arrears no answer until today. email: ********** until today 13.12.2017 I recieve a phone call from a new vodacom attourney Symington & de kock asking me to pay my arrear account of R17000.00. I asked Olivia how did vodacom come to that, so she promised to send a statement... not recieved until now. So I believe that vodacom and MBDCS never sent my payment through to reflect on my account or they just dont care. I realy need them to assist me urgently so I can pay them the correct amount I owe....