I reached Apex Predator this way, yet my account got banned?

I ranked up from Diamond to Apex Predator, the highest rank, in a single night using this method—does this count as a violation?

I was a Master-ranked player last season. What I did was team up with my friends, drive vehicles to gain a wider field of vision, hide behind various structures to wait for enemies to show up, time my abilities perfectly as a bow-wielder, and then charge into the fray to take them down. With our seamless coordination, we climbed all the way from Diamond to Apex Predator in just one night. But the tragedy is that EA banned my account, claiming that we violated the game rules. I was only using the game mechanics legitimately—why on earth did you ban my account???

I submitted my gameplay recordings to EA and filed an appeal, yet I haven’t received any response so far. I’m truly heartbroken. As a manual laborer, the happiest time of my day is playing Apex Legends with my friends—but now all of that is gone.

My EA ID: liuliuliu778566My appeal case number: #232865155

I hope EA will provide me with a reasonable explanation.