Worst company ever !

When I opted to pay off my Woolworths account , the lady from the call centre said I qualify for a discount ,and I consistently paid off the amount required of me monthly for the specified amount of time ,but when it came to the last payment debit to go off ,it was a public holiday and they sent out messages to say that the debit would be delayed. I left the required amount in my bank account ,but they did not do the debit. A few days later I get a call from another lady of the call centre to say that because I didn't pay off the amount requested I would need to pay more money ,I was furious and told her I would not because it was not my fault they failed to do the debit. She made it seem like I was lying until I told her I was prepared to email my bank statement to prove I had the money in the account. She said she would speak to her manager. She called me back and said I'd need to pay two more installments because the discount fell off the system now due to the payment not going off .I wasn't happy about that since it was supposed to be my last payment but i still agreed to pay it .Anyways now I just had another debit go off which is now two months after I spoke to the lady and the balance is as though I've only made one installment. It's like she restarted the whole process again !How is that possible when I've even paid more now then I initially was requested to pay ! They are ******** people into paying more and more money and this isn't right . My advice to you is not to get involved with this company and don't trust anything they say to you because they don't have any integrity and truth .