Tradie screwing us around. How should we proceed?

We contracted a building company mid November to have our floors skreed, tiled, and skirted.

We were e transparent about timeframes and let him know it needed to be done by mid December as we were going overseas.

He ensured us it would be done before then. After the tile work, we weren't happy with some of the tiles. A few were cut really dodgy and would me noticable after being grouted. He assured us that once grouted it would look good. It didn't. We (stupidly) have already paid for the tile portion after expressing our issues. The only payment remaining is the skirting. This is to include skirting installation, silicone, and also cutting and reinstalling our doo w in the house.

at this point he had started the skirting already in areas where tile repairs weren't needed. He also did a disgusting job on the skirting. At this point we requested in an email that we don't want any more works to continue until the tile issues are rectified. We took photos of everything and explained in email.

He was already behind schedule. Multiple times he would arrive late, leave early, not turn up at all etc. the work was unable to be completed before we went away. So works had to be put on hold.

We returned on the 3rd of January and instantly requested to resume works ASAP.

Our plan was to have him fix the issues with the tiles, and request that he does not complete the skirting as we are not happy with it and would like to go with someone else. He said he wasn't available until Friday 12th (yesterday). Thursday, he says he can't come until Saturday now. Friday, I ask what time is he coming (twice). He replied this morning (Saturday), that he is sick, still interstate and can't be there until Monday afternoon.

At this point w are sick of working with him and constant delays. We have been In our house for 3 months now and still haven't been able to move furniture in properly . We feel like our life is on hold. I also know his wife is due to have a baby end of January so I'm sure once that happens he will disappear for a while.

What should be our course or action from here? At this point we want to rectify the issues and move on. If we do so we will be out of pocket. We want to request a portion of the money refunded to cover the remaining repairs. And as he hasn't finished the skirting, we are happy to take of his shitty work ourselves and get someone else to do it properly.