Nedbank Bad service

I app**** for an overdraft last week, on Thursday(04/08/2021) at 15:15 I email the signed documents back to them, just to find out on Tuesday(10/08/2021) nothing was received. I have a read receipt on my email and could see that the person I sent the email to indeed read my email. On Tuesday I re-sent all of the documents. No response you have to phone and find out if all is in order, no acknowledgement nothing, yesterday I get told it's an IT error with no time limit on it. I use to think Nedbank is the best but now I wonder, they can't help me when I need it the most. It's so disappointing.