He means to ping MIA so they don't roam and get more kills.
NEVER expect your jungler to help you when you're losing, especially if you fall behind. From the jungler's point of view, it's more likely to bring them further back than to bring you up.
Try to hold the tower until tower FB is gotten, then let it fall. As a toplaner,
is a MUST.
Also, Don't. Play. Tilted. Tilt is probably the number one reason you will feed, because you start to lose focus while also trying harder to carry - meaning you play really aggressively really poorly. After two losses in a row or one particularly rough game, give it a rest, play an aram or look at dog videos or something. Don't go back into it until you're feeling confident. I personally watch some of my favorite league youtubers - especially Foxdrop - because it both makes me excited to try to carry, puts me back in the right mindset, and gives me something to focus on improving. Foxdrop in particular is an educational channel and he can give a lot of tips for specific issues - like how to die less. I tend to look up something that focuses on what I'm currently having issues with. And remember, the goal is to improve in order to win, not win in order to prove that you're improving. You will play poorly some games and carry others. Accept that and try to figure out what you're doing right and what you're doing wrong.