I think am gonna lose my job because of reddit

Hello makkale, I am working in a company where mobile phones not allowed inside office premises so I always used to read reddit for time pass and used to read reddit for work related doubts. Suddenly they blocked reddit and youtube when I asked them they said using office pc for social media is restricted. I don’t get this because am digital marketer. I cannot do work without involving in social media. Also reddit had helped me solve 70% of work doubt I Don’t know what am gonna do. Later they went to my colleague and asked him whether he can do all the work I am doing? This is so suspicious. Please advice me or share your perspective on who is wrong here and what should I do? Note : I also used to listen to songs while working in office pc