Nashua Mobile

Good day. I just want to find out if I'm in the wrong here. In 2010 the company i worked for closed their doors. We all got retrenchment letters. I took that letter to Nashua mobile in Brits and explain what was happening. Gave in the letter and left it there. The following month i went back to Nashua and the lady told me its sorted. Now In 2019 after 11 years i owe then 25000 rand. How can that be and after so long. Some one did not do their job. For my part they can drink redbull and fly to hell. This is not acceptable at all. They will not get a cent from me.