old debt

I've submitted an application for a mobile phone contract only to be told that i have an outstanding balance of R6829.70. I then advised the consultant that the debt has prescribed, based on S10(1) of the prescription act. On the 28/09/2018, i spoke to another consultant who seemed a little bit more enthusiastic about assisting. The consultant advised me that this account has been in collections since April 2014. During this period, no further action was instituted to recover the debt. I would like this issue to be resolved, because, to all intents and purposes, this debt has in fact prescribed. There was no acknowledgement from me which could have interrupted prescription.