Samsung A50 mobile data problem

I have a problem in my A50 since 6 months. 4G is always displaying on but data doesn't transfer after few seconds. It transfer few packets of data after some minutes and again the problem. I can't watch even a youtube video from this phone. I didnt try to exchange my phone as I have WiFi everywhere in home and university but I always suffering on the way. Will they give another phone insted of this? I saw lot of samsung users have this problem in the forum