Wrong answer to security question

Hey there, I think I forgot the answer to my security question, I am not 100% sure because I've tried more than 20 answers, is there a chance that something mixed up and the answer has changed?

I've filled a support ticket but I didn't get an answer in 2 days, I can't raise the invoice, the payments are delayed.. Is anyone else experiencing this? 

How long does it take for the support to help me out? I've also sent a photo of my ID, I'm sure it's a 2 min fix for this..