Girls, can you please tell me if anyone has had such an experience? We…

Girls, can you please tell me if anyone has had such an experience? We bought Nutrilon baby food, it's not reflux, but we still burp a lot. Bought Nutrilon antireflux, it doesn't burp as much, but immediately after eating, we poop. Then we cry that we want to eat again, we have to feed them again. And so on. We bought Nan antireflux formula for 3-4 days already, sometimes we still burp like a river and can't go to the toilet, it's very painful, we have to put micromes, candles to go to the toilet. How do we deal with this situation, maybe someone could suggest something?