Edgars has no concern for rights of the disabled

My husband has received repeated calls regarding his outstanding edgars account. Due to medical bills surrounding an accident he was unable to make payment since January. We finally went in to make payment of a reasonable amount yesterday that would not break the bank. I paid with my debit card. The consultant at the till put through an amount of R4170! We were referred to customer 'care' who advised us that the account was blocked so there was nothing they could do to reverse the amount. We asked them to try and they called the call centre who refused to remove the block long enough to reverse part of the excessive payment. The manager at the store then advised my husband to contact our bank. We have done this and were advised that only the merchant can reverse the transaction. Is edgars in the habit of using bullying tactics to rob the disabled? He intends to settle over time by arrangement but not R4k at once!!! We want this transaction reversed into my account. Our childrens needs cannot be explained away by an *********** and uncaring retail company!!!