Let's Encrypt Installation

The SSL certificate should be installed automatically by your Hosting service. If it not I suggest that you consider changing your hosting provider.

Having started out with a hosting with TSOHost I am seriously thinking about whether I will continue with their service.

My experience with TSOHost and SSL Certificates

In keeping with my other hosting service, HostingUK.net, TSOHost formerly offered free installation and configuration of Let's Encrypt.