Moneys owed and Handover without any crospondese

I worked for Sanlam Sky for almost two years and resigned this year February, I completed the exit forms and they were emailed to HR for processing. In may I received an sms informing me that Sanlam Sky had handed me over to the lawyers and they will be in contact with me. Few days later a lady from Bomman Marlow Attorneys saying they were instructed by Sanlam Sky to recoup moneys I was paid in advance. I went to the office office for clarity and after +-45 of up an down with the gate keepers and head office on the line with no one available to answer their phones I left with no answers. From them on day in and day out I fort with the ladies from this lawyers cause now from the 1st call they said I owed Sanlam Sky R10, 200 and I asked them to stop calling me as I knew for every call or sms they will be billing me. After I started receiving smses and the last one said I now owed R12, 800. Till this day I haven't received my moneys fron Sanlam Sky but they were able to hand me over to the lawyers with any crospondese. I have spent soo much money calling and emails without any success trying to get Sanlam Sky to pay me my money and also get an explanation for the handover.