The election system distorts the vote quite dramatically in the US, that’s true.
However, depending on where you’re from left has quite a different meaning from what Americans mean when they say left. E.g. the Democrats don’t want to dismantle capitalism or expropriate real estate companies (the city of Berlin seriously looked into this option). Center left has a similar shift in meaning in other countries.
You should report it to the Bundesnetzagentur, spam calls are illegal.
https://www.bundesnetzagentur.de/DE/Vportal/AnfragenBeschwerden/Beschwerde_Aerger/start.html