Edgars Finance Office in Disarray!!!!!!

During Lockdown, I paid my Edgars account via EFT. Edgars have no recollection of the one payment, despite being sent the POP. After lockdown, I paid my account in the Greenstone store, thinking it would be easier to record, yet Edgars claim to have no record of this payment either,despite me sending them a copy of the bank statement reflecting the payment. This saga has been ongoing since June and I am being told my account is in arrears when in fact, Edgars owes me! I repeatedly send emails, with my Proof of Payments and get no feedback whatsoever. All the communications from Edgars side are repeated requests for payments and SMSes stating that I have not paid. When trying to call Edgars, the Customer Care Centre is unable to help me. I receive promises that the matter has been escalated, yet two weeks later, Edgars remains silent. I do not know what to do to rectitfy the situation. If this is the manner in which Edgars runs its Finance Offices, it is hardly surprising that they are about to closes their doors?