Need Prescription Letter to start a life

My name is Lebo, my account was handed over to DMC by Sportscene. The account was with them since 2016 and I can not able to pay them since I do not have a job. I been asking for the debt to be prescribed according to The Prescription Act, no 68 of 1969. However, for the past 7 years I receive harassing phone calls to settle this debt. Phone *** ID *** email. ***