Do you have a doctor you can talk to? I'd look at local drug treatment programs too, see if there isn't some counseling and/or support with some ideas of what you can do. I'd fix it so I did not have any cash/it was inconvenient to buy them or I'd not allow them in my house, etc. (I did that once with not allowing myself to go home until 8:00 p.m. everyday, trying to get myself to quit isolating, etc.) You are the only person who can really do anything about the problem they are giving you. Maybe go to a dentist and "confess" see if your teeth can be salvaged?