Gaeilgeoir
Hi Gaeilgeoir,
I guess **I** am the only valid judge of when a post is a solution to **my** problem, so I un-checked the "solution" marker that somebody (not me) checked on your post...sorry!
I got another annoy-o-gram from Swisscom in German today, with all the option switches in my Swisscom profile now turned OFF.
My mail-reader is set to not download remote content.
The junk-mail without the remote content ends with this:

...no "Abmelden"!
I normally just delete junk mail. As an exception, today I downloaded the remote content.
...a mess of adverts for crap that I don't want (in ANY language).
The remote content ends with exactly the same text as above. Not an "Abmelden" to be seen anywhere!
Clicking "Abmelden" may well be a solution for something, but it is not possible for this case.
Deleting the mail works well (until the next one), but I'm not overjoyed at the idea I'm paying Swisscom to spam me.
Chris
PS: Yes, of course I know deepl.com exists