Dealing with DHL feels so sketchy

I have had such bad experiences with this company, who are meant to be industry leaders.

I thought I would try them again after many years. I booked a collection from Switzerland for documents to be delivered to SA.

They quoted me, charged my account and then nothing. No confirmation email or receipt of collection of collection confirmation. But they have my money.

I emailed them with me details, name, date of the charge to my account, my email and number and they are asking for a confirmation number which they never sent me.

It feels so sketchy.