Collecting on prescribed debt - never acknowledged online complaint

We received a summons from Groenewald Lubbe about a Petrol card that we had in 2005. We went under administration in 2010 and this account was not part of the admin order as we thought that it had prescribed seeing that non contacted us in so long. I also received a statement from the attorney and found that there was a payment in 2015 which neither my husband nor i had paid so i questioned the method of payment and neither FNB nor Groenewald attorneys can tell me where that payment came from. Further to this, i questioned prescription as prior to 2015, the last payment was in 2011 (again, not paid by us). Between 2011 and 2015, this debt would have prescribed. I was also told that the admin order was rescinded hence summons issued however, this account was never part of the admin order so where did you get your information from? I am now defending the summons but before doing that, i logged a query online and guess what? FNB hasn't contacted me until now...Please can someone from FNB look into this as you shouldnt be collected on prescribed debt. Furthermore, where did the 2015 payment come from? ref for the online complaint is ********** logged on the 18th of April 2018.