FM Book Stopped coming without any notification

Hello , i am a loyal supplier for Financial mail book for past 3 years but for the past 3 weeks, book stopped coming I called Financial mail office, and spoke to pearl , as per Pearl, my subscription ended May 2017 , but then i asked her , if it expired in may 2017 , then how come i kept on receiving FM book for another 6 months, i was getting FM book till Dec 14 , after that it stopped she do not have an answer actual fact is, i have subscribed till may 2018 , some one in FM accounts dept have messed up and have not allocated properly but now they asking me for proof of payment, which i do not have , surely they can track the payment from their side, it was EFT payment can some one please assist,