I think I would just start from the beginning. Decide if you want pee pads or outside. Limit his access to your house. Use positive reinforcement (food treats work well.) Forget the past 8 months and start from scratch. I wish you success. 
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We give dogs time we can spare, space we can spare and love we can spare. And in return, dogs give us their all. It's the best deal man has ever made. -M. Acklam |