What to do about team feeding zaryas charge

Just had a game where my tank started as rein but swapped to orisa when he saw the other team chose zarya. I'm only in silver but I know that that's not a good swap. I told him in chat after he kept dying amd he finally swapped to hog, but even then zarya was almost always at full charge from. It wasn't just my tank but my dps also just kept shooting at her bubbles all game. I tried telling them in chat but was ignored lol. Then at the end of the game my tanks blaming me for not healing him. Is there anything else I couldve done or was it pointless? Thanks