Bears/ Lewis Payment Confirmation Nightmare

I have bought assets with Bears Jabulani Stores in 2015 and been paying my account on my monthly installments via electronic fund transfer( EFT) and was given an account number ********** 31001 as my reference since then. They always received my payment but for the month of May 2019 my payment is still not allocated a week after I processed it. They keep sending me sms on my overdue payment which is already paid so not sure what is wrong with their systems to not locate my EFT payment for allocation. I made few calls with call references 642069 &642087 But no Luck but stories. Their customer support is *********** and cannot locate or refer me to someone who can assist me by locating my payment processed on 27 May 2019.