Account is getting Suspended

Hello Everyone, I'm new to this stuff... Recently I've got some twitter profiles that got huge reff. domains so i registered them..

I didn't use any kind of proxies.. i had 2-3 mobile numbers so used those to verify all those accounts and i've also verified emails to avoid blocking..

But still 2-3 of those accounts got Suspended... So someone plz help me what to do to avoid blocking

Is using proxies necessary? and how much would it cost to buy proxies... i'm really new to this...