Hello Laynne,
I don't think it's right. Otherwise, you can always make corrections afterwards when the dining table lamp is right above the table, the bathroom light cable exactly above the bathroom cabinet, the dishwasher socket near the dishwasher, etc. We had that, it definitely shouldn't be like that.
Normally, the drawings showing where and how things are installed are part of the contract and therefore it must also be where you decided. With the crooked slots, I see it as given that you can't drill near the slots without first using a metal detector to find out where the cable meanders.
I would involve the trade association chairman of the district. You can pay him by the hour if he is to take a look at it. The electricians consider themselves the top of the construction trade, but that rather puts the cherry on top of the matter. The business owner should deploy his clumsy worker in a less harmful way.
Best regards, Gabriele