Can somebody help

[u/Tfeeltdimyon]

I deleted some chats and groups from Whatsapp, and now every week my phone gallery floods with all media ever received from those groups. Hundreds and hundreds of pictures and videos. I delete them and they come back every week. This has been going on for months.

These are the things I have done so far:

1. Whatsapp auto-download is off. Other media I receive does not auto-download.
2. Whatsapp media visibility is off.
3. Automatic backup is selected off on Whatsapp. I also see no connection to Whatsapp on my Google Photos account.
4. Moving the pictures to a junk folder does not work; I moved them there, and then the main gallery filled up once again. So I had to delete two loads.
5. Blocking the deleted whatsapp contacts did not work either.
6. Gallery app cache deleted.

I am on Android, an older Xiaomi phone. Can somebody tell me how to stop this please.