SCI Marketing?

Just be informed that you don't do anything against the laws in your state and this loan company holds back on you. You should have strong reasons about this company violating the laws before you block them. Blocking the account won't be a good idea just because you are unable to catch up with the repayments.

Can you throw some more light to your situation for the perfect advice?

I have paid my loan in full and they keep debiting my account. I cannot find any contact info to call them, so resolve this, so I feel the only option I have is to block them. What do you suggest?

Did you go to your bank and ask for their address info. It should be available there. Tell the bank manager about the unauthorized debits. They will dispute with the company and get your money back.