High admin fees very delayed responses causing late delivery

Hi, I am a bit disappointed with the service I received from TNT recently. I had previously used their service and it was much more organized but it seems that it is getting worse. I had a small parcel (less than 2kg) that needed to be delivered on the 24th of May. After checking the tracking number countless times, I noticed the shipment is stuck in Cape Town since the 21st. I emailed TNT on the 23de asking what is going on with the package and why is it stuck, only then did I get a call for the Import number. The 24th I sent another email, still no invoice supp**** and they moved the delivery date to the 31st. Emailed them again on the 25th with still no reply and no invoice. Finally received the invoice on the 28th and I don't mind paying duties and VAT but the ADMIN fee was higher than the package's own value. This is for a package less than 2KG and very small... I would have understood if the package was large and bulky but this is not the case. I feel like this is a case of ********* (package wont be released unless you pay) and this just ****s smaller business because of the high admin fee. Will rather try and use an alternative service in the future. Hoping to receive my package before the 31st...