Rude callcenter employees

In the middle of December 2015 I was called by a rude lady who asked me when to debit the account I said by the end of December as I am getting paid on the last day of the month. She told me that I will tell her that I want to pay my children's school fees. On the 28/02/2016 they went to debit on my account while our agreement is on the last day of the month then they called me on the 02/03/2016 to ask me when will I pay my account, I told her that the reason I asked for the debit order is that I don't want to stand in queues. and ended up asking to debit the whole balance she advised me that the debit order will be on go on the 07/03/2016. Today I was called by another lady who was telling me about the specials and I told her that it is and inconvenient time to call as I was busy at work, she told me that why did I answer my phone is should have left it unattended. They are so rude