What I learned in one of my courses where we talked about addictions, is that people with addictive personalities tend to replace one addiction with another. Now, saying this doesn't present it as a positive thing, but it can be.
I started by completely taking these socials medias out of my life for a whole entire month, strictly. I didn't get on a single time to any of them once. And I replaced the addictions with something else. At first I thought maybe games would be good, but it was hard to get on my phone without going to these sites. So what I did is I replaced them with reading. I would take 2 minutes to read a couple pages, read on my ten minute breaks, read on my lunches, etc.
You don't have to do that, although I recommend it, but I would try to replace it with something that didn't have access to it, and then you'll have more control over it.