Debit order delay request

I asked fnb to delay my debit orders until the 1st of Dec because I knew they wouldn't find any funds before then. Told them the publicly known reasons about my employer paying salaries late and I was assured of the delay. Yesterday, they run debit orders, they find no funds, they declined those debit orders and charge me R120 per declined D/O. This morning I call to find out why... Because I am really ****ed!!!! I'm being told that there is never a guarantee that debit orders will be delayed. Did the representative I spoke to initially explain it to me like that? No!!!! Had I have known... Was I going to allow FNB to even charge me R120 for each decline? No.. I would have made another plan!!! So unprofessional and always looking for ***** ways to milk people of money. I should have been warned before hand... Such an inconvenience of a bank.