Bloody builders!!!!

Hi first time posting just looking for advice from fellow sparks, having troubles with builder at home.
He’s suppose to be knocking down some load bearing walls and fitting steels, fitting a kitchen and a couple of windows.
Was agreed this week he would knock walls down rip out kitchen and fit the steels. Came Monday did a bit on a smaller job upstairs which was suppose to be finished last week which we’ve paid and still waiting to be finished, Tuesday knocked down a small plaster board wall and knocked some plaster one of the walls coming down,
Wednesday didnt turn up got someone to come and rip the kitchen out not a big kitchen about half a day and Left a gas pipe turned off but without a cap on the end and the isolator a nice height for our 3 year old who likes to touch and play with everything, which we mentioned to him but he didn’t bother coming and doing. He told us a plumber would come today but never turned up. Was suppose to come round tonight to discuss things but he’s sick
He asked us to pay him 2k beginning of the week so he could have a float to get material and labour. Since then we’ve paid for the skip, arranged and paid a deposit for the steels and only had someone here half a day to rip the kitchen out.
Now he’s holding me up on my electrics in the kitchen
He’s been hard to get hold of these last few days. When we try speak to him about our concerns he says we are putting under too much pressure and making a big deal about small issues and has twice Threatened to walk, would just get someone else if it wasn’t for the 2k and the last bits upstairs.
Would appreciate any suggestions and advice obviously not feeling very confident with him
Thanks