They started messaging me about Roblox for no apparent reason

I was playing normally in the game when suddenly an account from a very unknown number and the Warrior of Pronunciation started writing to me and sending me messages in the game chat. Then this user disconnected from the game where I was and later started insisting on friend requests... I accepted a request because I thought it wouldn't be anything strange or bad, and suddenly this user starts writing to me through my game account. I didn't reply to any message but he started asking about my phone number, IG account, FB account, etc... Be careful about accepting requests *even if it's just to get rid of a nuisance*