503 Errors On Off On Off Confused

Hi,
My site today got a 503 error, this happens most weeks, when the site is connected to cloudflare, 503, when i paused it, it comes back on, the name servers point to cloudflare, i did changed them back last time, cloudflare is on now, 503, when i pause, it go back to normal, for the love of it, i am so confused

I do not want to keep switching cloudflare off, I an not good at tech, however, i can get the site back, but that means pausing cloudflare…cloudflare blame my host, my host blame cloudflare, I can fix this, but i have to turn off cloudflare, pause, or remove

Thanks