Disappointing express shipping one whole month and still have not received my package

I had a parcel arrive on the 28th March 2018 to date I still have not received it. At first it was with customs I paid first invoice then was told it was held by CBCU then paid a second heavy invoice there was very little communication with TNT had to drive to their head office twice and constantly had to follow up. I was told they would be delivered this week and today I call and I am told Monday. This has really been the worse experience of my life with a shipping company and the customer service has been absolutely terrible, I've been told my case isn't unique and I must just sit down and wait while my business is at a absolute stand still. Very, very bad and now that I know that they are acquired by a huge company such a Fedex is this how you treat you smaller client just because I'm not a multimillion dollar company. The time this took I could have used a ship which would have been cheaper and it would have taken the same time period . I am very angry right now.