It would help if you could break down the costs. I.e what work has he done? What materials did he supply?
Personally I would right down a snagging list of what you aren't happy with. Hit him with it and see what he says. Ultimately with the floor I would expect him to cough up for the tiles and materials and to pay for a Tiler to lay the floor correctly.
Personally I would right down a snagging list of what you aren't happy with. Hit him with it and see what he says. Ultimately with the floor I would expect him to cough up for the tiles and materials and to pay for a Tiler to lay the floor correctly.