What are you thinking using DSV Couriers?!

I have had the worst customer service experience of my life this past week. I paid my vehicle off in 2016. No further correspondence. I have just sold the vehicle and been asked to provide documentation that upon investigation, I never received?! I received the letter confirming the car had been paid in full, but nothing else. Bringing this to the attention of TFS, I was basically accused of lying about not receiving the documentation. I requested an escalation and was informed that your courier company, DSV had delivered the documents to my unsecured complex in 2016. No phone call was made and no permission was given to hand this documentation over to what appears to be a complete stranger. DSV are refusing to take responsibility for documents that they basically *******ly handed over to someone who had no right to sign for it... I am now being forced to pay R 415 for duplicate copies for something that wasn't even my fault! Wake up TFS - go look at the review on here and the complaints on Facebook. My issue is not a rare once off problem... Why use a company with such a terrible reputation and then treat your customers like fools because of their incompetence? How do I receive these documents now as I REFUSE to allow that awful company anywhere near them?? Very disappointed in the way you allow your suppliers to get away with ******** activities!