Barrett claiming payment for alleged services

I received a telephone call a week ago to urgently pay the outstanding amount owed to FNB on an alleged petrol card issued to me in 2003.<br> They say I was handed over for payment to Barrett in 2013 and they are finalizing judgement and summons.<br> I have no record of this alleged card and this is the first communication I have had itr from anyone.<br> I have called Victoria Leeuw at BL a few times and emailed her for details of this alleged outstanding account, with no response.<br> How do I pay for something (and probably get listed on credit risk sites) that I have no knowledge of.<br> My only petrol card is still with FNB and linked to my account (therefore a debit card which cannot draw credit).