Forced to pay lawyers after medical cancelation

My name is Constance Matshi In 2017 I complain here about gems making me pay R5400 after serving them one month notice, it was resolved. Now I'm being called by lawyers saying I owe gems after 3 years. When I cancel my medical I was on government subsidy which I paid personally only R1800 the other 3700 I was subsidiced by gov. To my surprise a month after serving I'm told I have to pay full amount of 5400 where's they had an opportunity to that over my salary. I'm not pleased with gems I feel that all my family and friends should cancel this **** medical. I'm angry that you are so unprofessional.