SHOCKING Service from the Accounts Department

Absolutely SHOCKING accounts department. They have not been allocating our payments to them - and now claim that we owe them over R23,000 and have blocked our account. E-mail after e-mail to them. We send the proofs of payment to them - they don't allocate them and just send the same statement back claiming we have not paid! We phone to speak to a manager and get put through to some guy sitting in a contact centre in India. No one will assist or refer us to a financial manager who can help resolve this query. Fedex have lost a customer.