I am a disgruntled ex-employee of McCarthy Nissan

I am a disgruntled ex-employee of McCarthy Nissan and have had enormous issues from the first day I started working for the organisation in October 2014 with the HR department.<br> <br> . In October 2015 I handed in my resignation and worked my notice period and signed all the documents that I needed to once the exit interview was done.<br> On the 6th Jan 2016 I called Lynette at HR to find out about the progress of the pension fund, I was advised that the dealer had not sent the forms that I signed in November and that I should go to Germiston and sign these papers, when I got there she found the documents on her e-mail that was actually sent by the dealer the only two things that were missing was my ID number and Tax number, that appears on my payslip that she also has access to<br> I was accused of being Dishonest for not bringing it to her attention that in December I was paid a full month's salary that wasn't due to me.<br> How would I have known that was a normal salary and not my final pay that is essentially due to me? <br> A week later I called her response was \I am busy with salaries "to me that sounds like\"" you not important and will get to your issue later<br> Can someone please help"""