Are you sure that your APN settings are correct?
Where are you located?
Do you know others on 48?
If so do they have the same issue?
What sort of speeds are you getting?
If you need to contact 48 support about this then see the link in my signature below or email them at email@example.com
Would you be able to try your SIM in another unlocked phone to test the speed there?
You may need to contact 48 support about this as I suggested.
The issue I am getting most annoyed with is the problem my data can hardly hold 2 people on my hotspot while us 3 people are playing a game (Call of duty Mobile)
I wouldn't expect mobile 4G to necessarily work well in this context due to variable speeds and high latencies. It's not really well suited for gaming. But, as I've said a couple of times already, contact 48 support about this and see if they can do anything about it.
What speeds are you getting?