Never let them use the front door unless they are fixing it, the same goes for the toilet
Afterwards, complain, complain and then complain again whilst shouting loudly....HOW MUCH!!!!
Then go to Aldi (Lidl if, well you know) and kit yourself out with a full kit of workwear (Do not forget the tool-belt) and all necessary tools, then onto YouTube and find out how to repair their bodge correctly...In less than half of the time they billed for, you will reach the Job done phase. Big pat on your back, and then immediately start saving for the inevitable repair that you can then blame on the previous tradesman to your new tradesman
Somewhere in there, a dairy free cup of tea or coffee or even a herbal remedy, along with a vegan roll or sandwich and some sugar free biscuits can have a beneficial effect