Bad service ?

Last month Finchoice apperently had problems with their debuting systems and they tried to debit my last installment on the 28th instead of the 26th. A consultant called me 2 days later to inform me that my account is in arrears. I explained that by this time there is no money in the account because I know that they debit on the 26th and didn't know that they did not. I then explained that they should debit on the 26th of April as they will get money in my account and the consultant agreed without even telling me that I should make alternative payments. Now today I call finchoice with the problem m having with my mobi account and they tell me that I don't qualify because I skipped my last payment and it came in late(26th April). I tried explained to the consultant I spoke to today and she told me that it was my fault the there was no money when they decided to debit. I have never spoken to such a rude person that shifted blame like the consultant I spoke to today. We ended our conversation with her saying that she will leave it on the system to update but she can't help me. I've never been so disappointed in finchoice all the time I was with them ?