Advice or solution on consistent 2 - 4 man ganks?

I got camped the same way a few times yesterday. Though the actual amount of ganks was pretty ridiculous per game (I was playing Yasuo/Diana counterpick mid) 1st game enemy jg spoke in all chat against his teammate calling my yasuo good (i forgot items lol but 1v2ed her and him early) and he insulted that then proceeded to camp. Ended up being a pretty verbally aggressive team after that. Diana though, I chose her simply because I knew she countered Fizz/Kat well enough got constantly ganked. I was pushed pretty far, though I always had a ward in at least one brush though that didn't exactly help considering most of the 10ish ganks had me cornered. I ended up asking my team to actually stay near/counter gank though they didn't actually come until around gank 7. It as a bit irritating but I pulled through and won. Anyways what did i do wrong? I thought about buying pinks, but with the amount of times I was being ganked I'd have to buy at least 4 every back (2 for each side of the lane, and 2 backups for when they destroy them), Im pretty lost.