On Fri, 22 Mar 2019 21:29:32 +0100
Roby  wrote:

> In the etc/apt directory there are no apt.conf.d* files
> therefore no proxy is configured  ;

Except you should have been looking in /etc/apt/apt.conf.d/ for files.
Your propensity for typo's makes me wonder if that's the problem.

--- SoupGate-Win32 v1.05