Convince the tagger via PM to remove it or open a thread about it to see how many users support deletion, usually it heavily influences the tagger's judgment.

Not wanting to flag does not mean defending, DT Members will no longer aggressively flagging in merit abuse unless it is related to other issues that incur financial losses. Again, the evidence you bring with you is not enough to call them scammers by community standards. In the real life, not all abuse is part of scam.