DHL Express poor service

I made the mistake of using DHL again. These guys are the worst when it comes to customer service and getting back to clients. Have a parcel coming in from the UK. The tracking information noted that they required additional information and that DHL were going to contact me. Waited and waited for them to call then decided to call this morning. Spoke to Kedibone and she wasn't clear what type of invoice Customs were requesting. After spending some time trying to figure out what information was needed she confirmed that they needed the commercial invoice. I got it sent to her within 20min of that call. She didnt even acknowledge that she received the email. Sent her two emails to request feedback and still no reply. Even tried to call DHL and message went to voicemail. Really poor service.