More than a month and still waiting for original documents

I have always used Wesbank in the past for my vehicle finance needs because of its excellent service. However, it has now been more than a month since I paid my final instalment (28 March) and requested via email to be sent/couriered the original NaTis documentation for me to transfer the motorbike into my name. I sent emails on 28 March, 4, 10, 17, and 26 April, always receiving an "automated response" that someone would be in contact with me - this never happened. I also received an email that the documents were sent to the address I provided, but I have never received such. I am frustrated and very disappointed in Wesbank.