Most of these companies ‘preset’ their mailing lists for weeks and sometimes months ahead. The first suggestion is to wait a bit longer, at least multiple weeks. A more permanent suggestion to stop receiving their spam (not them sending you spam) is to make a filter in your email client to just delete anything incoming from temu.
Unfortunately companies such as temu appear to make substantial income from compiling and selling marketing information so customers are often prone to getting spam from a wide range of sources that sometimes are legitimate and can be unsubscribed from, but often an unsubscribe only verifies your real email address. One cannot always tell the former from the latter, but each can be added to a delete filter.
Some examples of setting filters (aka rules) are
or Thunderbird
or yahoo
or outlook
